I’m sorry you had to deal with that lemmy is definitely a bit more wild in terms of strong opinions, some very cool people on here but also a lot of immaturity.
I’m not trans but isn’t that a normal thing to think before posting? I’m fine with saying to my friends “(wo)men have hurt me in the past, and it makes me less trustful of them” but I wouldn’t comment that publicly, since either I get weirdos saying “yeah I hate (wo)men too” or weirdos saying “the other sex does this but worse!” Either way they don’t get what I mean, so I’m going to be very careful with qualifying what I say. It’s a hot-button topic and it sucks I have to do that just to share an experience, but a lot of people are sensitive (myself included) to perceived attacks. I still get people misunderstanding it, but that’s usually 1/100 instead of 1/5. It sucks that it doesn’t feel like a group of friends, but there are a lot of communities on lemmy that will ban people acting like jerks (lemmy.blahaj.zone for one)
.world is also the most commonly linked instance on reddit, so half the time you’re just dealing with angry redditors. Generally every time I say “wow this is so disappointing to see” it’s a .world post and the other half of the comments are trying to fight back against them. I think it’s just the nature of online communities that they get more toxic as they grow.
You’re definitely dodging more toxicity than you are positivity with blocking .world, every time I’ve seen just the worst comment ever it’s from .world. There might be an app or way to block the comments but not the posts from an instance, since nearly all .world posts seem fine (you could ask in the app community on lemmy, they’re generally super friendly). Sorry I can’t give better advice. Me personally I just stick to the positive communities and only brave the .world trenches if I’m feeling up to it (and make heavy use of blocking toxic communities)