I have had a tendency in my life - mostly my teenage years - towards revisionism, probably in large part just contrarian douchebaggery that also saw me embrace Alt-Right shit that I've mostly turned from in late college years. Despite that I don't regret any of it, because I have found that revisionism actually helps me to appreciate history much more and understand it better.
Firstly, revisionists tend to know more about their subject matter than casuals. There's lots of casuals who either don't care about history, or do care about it but are too lazy/unthinking to spend any time thinking through what they hear, so they just parrot whatever the dominant historical narrative is. I know people like this, who genuinely know a lot of stuff but also hold contradictory views (like American Revolution good, French Revolution bad, Lincoln good) because they just jerk off whatever looks the most traditional to them, even if tradition means totally different things in different contexts.
Anyways, the revisionist has to know a good chunk just to be a revisionist at all. Of course, much of what they learn will either be factually incorrect, misrepresented, or incomplete, but I still respect them. But, if a person reads generally and doesn't just read their revisionist circlejerk, they should eventually get enough knowledge for their revisionist viewpoint to collapse. (Mind, some revisionism is actually correct; McCarthyist revisionism, for example, is 100% true.)
Now, the cyclical part of this is that I tend to find that there's a journey where as you study the revisionist viewpoint you'll shift to backing the bad guy, but will eventually work your way back to supporting the good guy, except now with way more nuance and depth than the normal historical narrative goes. It's like Hegelian dialectics. Some examples from my studies:
AMERICAN REVOLUTION
- King bad because tax and no democracy

- King not bad, tax imposed because colony started war, also offered representation in Parliament, also want kill Indian

- King is bad, imperial troops not actually used to protect colonies, also colonies were basically self-governing so the King was kind of useless, was fucking them over in ways had never done before, colonies were like their own countries BEFORE British tightened down
AMERICAN CIVIL WAR
- South bad because slavery

- South seceded over other things like tariffs and internal regulations, also North wanted South tariff money, also constitution gives right to secede, big government, Lincoln tyrant, North didn't care about slavery, South would have freed them all anyways.
- But no Southern state besides Georgia even mentioned tariffs in their secession documents, and can Lincoln really be called a tyrant when he let a contested election happen? Also, none of this big government stuff now had anything to do with political issues back then. Also Southerners had no respect for the Constitution when they suppressed free speech in their own states, they enshrined slavery in their Constitution, it was hugely profitable and they aggressively tried to impose it elsewhere. Yeah, the North had lots of racists, but they weren't really the ones in power. Also, is mild inconvenience for Whites nowadays worth having consigned Blacks to slavery back then?
TEXAN REVOLUTION
- Mexico bad because tyrant

- How would you feel if a bunch of people crossed your border, agreed to assimilate and follow the laws of your land, didn't do any of that, and then revolted to claim your land from you?
- True, true, but as mentioned above, the whole fucking country of Mexico was in a state of war and had an unlawful government
CENTRAL POWERS IN WW1
- Germany bad because aggressor

but totes sad they were victimized at Versailles :'| Save democracy, over there
- Germany was not the aggressor, WTF are you talking about? Serbian terror attacks started the war and then entangling alliances caused the rest of it. The US got itself entangled through its favoritism and the war to save the world for democracy was total bullshit (Germany was a federal constitutional monarchy, the Russians were a de facto absolute monarchy).
- True, but the Ottomans committed the Armenian Genocide and the Germans invaded neutral Belgium: you don't just get to invade a neutral country for expediency. The Germans were awful nasty barbarians who had no regard for life, as seen in their disgusting behavior in both trench warfare and towards civilians. The Americans did involve themselves but Germany did itself no favors with retarded policies like their submarine warfare and Zimmerman Telegram, and had in fact been saber rattling at them and everybody else for years, if they existed nowadays they'd be viewed like China and Russia are. The Kaiser played the single largest role of anybody in helping the Bolsheviks come to power. The Germans were extremely vindictive at Brest-Litovsk. A total victory like in WW2 shows that you CAN punish a country, you have to break them completely. And why shouldn't Serbia be trying to liberate its countrymen occupied by a foreign monarchy? Fuck Germany, fuck France, fuck Russia, fuck all of them, they're all shit and had it coming except Belgium.
AMERICAN INDIANS
- American Indians were dindu nuffin noble savages that lived in peace >

- Lolbro, Indians stayed at war 24/7 with each other and ate people and were savages and stole the land from someone else
- Who cares if they're savages? They could be banging rocks together and wearing loincloths and they'd still have a right to exist on the land that's theirs by conquest (if you've held land for generations, it doesn't really matter where you got it from, it's all water under the bridge), and anyways they weren't, they had sophisticated political structures (Haudenosaunee, Haida) and architecture (Pueblo, moundbuilders) and very rich artwork/crafts (look up actual Indian clothing, pottery, totem poles, etc.). Also, which is worse, eating the heart of a respected slain foe to gain his courage, or having bears fight dogs to the death for fun? They had practices which are disgusting to us because we're raised to find it disgusting, but a ton of what Europeans did was disgusting. Treating women like cattle was disgusting. The Southeastern Indian had a much more humane treatment of their people, more equal, more fair, more human, than the Europeans. Their religion also had no moral content but it was way more fun than Jew-stick. If they'd been allowed to develop on their own long enough they could have made some amazing civilizations.
Edit: That rant got off topic, but I really would rather live with the Cherokee in the 1700s than live with Hwhyte people in the same time where the rich people treat you like shit and the preachers beat you down with a Bible. And a lot of people back then agreed, which is why they went to join those societies. That they didn't have big things like cathedrals didn't mean their day to day living standards were actually that bad, there wasn't a ton of difference in normal day to day life for an Indian farmer living in a longhouse, eating tasty cornbreads and bean-and-game stews, than there was for a yeoman farmer doing the same shit in a log cabin. Except the Indian got to live in a functioning anarcho-primitivist society that had progressive elements without being consumed by them.