Making IRL friends is hard enough. Making them online is harder, since trust is real issue. You have to learn to grow callouses on your skin and take the heat. Most of the shit you receive here is tough love, like a big brother being mean to a little brother. A tiny percentage of it is legitimately malcious. If you can't take some mean words by your own peers being thrown your way, you'll have a snowflake's chance in hell of surviving in the real world.
Yes, there are a shit load of bitter fucks here. That's part and parcel of "the incel experience". That is, the constant rejection, social and sexual failure, and overall built up misery from years of chronic socio-psychological trauma. Lack of friends, humiliation, ostracization, a complete feeling of loneliness and feeling hated by the world. You can't rightly expect a cheery, happy-go-lucky motherfucker to come out of the end of that kind ordeal with all smiles and shit. Most people will be, as you would expect, BITTER AS FUCK. And this is from YEARS upon YEARS of that. I got lucky in the sense that my experiences with people of all kinds made me extremely jaded and attuned with the human condition, but not bitter. I learned from all of the chaos and found a way I could work with it and cope harmoniously.
What I suggest is to put the shotgun down again and try to expand the horizon of your viewpoint. If someone is being mean to you, the last thing you should do is to take it personally. You should be asking why they're being like that. Try to see it from their point of view. You don't have to agree in order to understand and empathize. I get into some heated discussions here, but my heart rate and stress levels are as if I were ready to sleep, and I take none of it to heart (I mean, I certainly think about what's being said, but don't let my emotions get in the way). You gotta use the online space to grow thick skin. The alternative is people getting up to your face and insulting everything about you, like in boot camp. Speaking of which, the army is probably a good place to steel you.
So stop being a sissy fucking faggot and keep your head high.