I learned that there are no people or ideas that are beyond questioning and that taking yourself and your opinions too seriously can lead to future regret and embarrassment, its good not to take the bait and just chuckle sometimes and be willing to test one owns biases without being butthurt about it. This was true for old 4chan but its been years since that site was killed and now is a complete antithesis, its not better than reddit, just another echo chamber full of bots and shills where everyone is butthurt all the time and take themselves too seriously.
Watching lolcows has been very constructive because they tend to show the ultimate worst course of action that one should not take. They are usually extreme figureheads from one or other aspect of contemporary culture and show the most harmful possible way to be led by and be fucked in the head by it, they always interact with culture, technology, communications, etc the worst possible way and sometimes you need sacrifices to do all the wrong things so everyone else know why they are wrong, like the first caveman who discovered poison berries and died from them.
Take

, he was a brony before it was a thing, he was an incel before it was a thing, he was constantly bringing his autism up before it became cool to do so on tumblr, he trooned before transtrending really took off and AGP transbians became mainstream, he was also fat and a manchild who collected funkopops before it became a meme to label those kinds of people, , he even had colorful views on gays, jews and black people before /pol/ even existed, he is the ultimate postmodern trash, a distopyan vision of what the ultimate result of internet and consumer culture can become and as such he is the ultimate millenial cautionary tale, we have all been exposed to that stuff to some degree and looking at him was a good red flag and a self awareness for when one is being carried away, you don't want to be like him, or Dobson, or DSP or any other cows, they keep you in check and make you want to be a better person and not fall in those pit traps or 21st century life like they did.