I've known or heard about MTF and FTMs who, as far as I can tell, had legitimate gender dysphoria and took HRT to try and get over their issues when they became adults. As far as I've been told and seen FTMs react to the change in hormones better on average then their MTF counterparts, MTFs can be mood swingy as hell for some reason especially if they had a lot of issues going into the process. Even the ones I know who are fairly chill most days and can function as normal people can get really emotional almost from nowhere at points. It doesn't do you any favors, especially within the first 6 or so months from what I remembered.
On the whole, anything you do that futzes with your hormones is going to give you mood swings. It may just seem more pronounced in males, who typically don't display as wide of an emotional range than before; it may also be a broader socializing thing, where you more acutely perceive deviations from folks that share your sex. T also may not swing the emotions as much, but good god what that does to the overall health of a female body is nutso long-term.
There's threads here of varying flavors to give you a broader grasp of the particulars of how these things come out - a more medicalized discussion over in Deep Thoughts, and a peanut gallery laughing at the absolute insanity over in the Community Watch.
Quite honestly, I used to be much more mellow to the point of ambivalence on trans people -- but I've wound up interacting with so many of the glaring, obvious stereotypes and so few "normal" folks that I now take it as a red flag. And... well, I've yet to be proven wrong on that wariness, much less to feel like I'm missing out on something by it. I guess if I ever developed a taste for shitty erotica farted out by a coombrain that can't pump out more than a sentence or two in a ten minute span I'd be hurtin'.
The... "environment" that the GMs foster in this game seems to draw them in like flies to carrion. In my brief time just speeding through on Crystal, I rather wonder why my friends saw fit to roll here. You know that trial where you literally just have to push a button to not die and the rest is cake, Lakshmi? Four uwu faggots died to that mechanic more than 8 times running, every single time. It was explained at least 4 different times. I don't even mean the knockback part - one guy died to that, went "oh, okay, gotta be in the middle," and then he was fine. I mean literally just 'push this button once in a 45 second window' was evidently too elite.