I think that some people had it coming from society/humanity. iin?
Often I see people online saying stuff like "I hate humans/society because they are so mean to me". Most often I would get the impression that these misanthropes are people who have been mistreated by other humans too often, but for some misanthropes I feel they deserved how other humans treated them.
For example, I remember someone online who said how much he hated humans for how badly humanity has treated him. Then I searched up the rest of his posts. He bullied and derided other people, he was racist and tried to incite genocide, and he acted like a complete jerk.
I am in no way claiming that there aren't any people who have had humanity or society treat them badly irrationally. It's no surprise that some people have been treated so badly by others that their view of other humans becomes soured. However, at least for a whole lot of other misanthropes, I think the people who think they have been mistreated are actually just major a**holes who don't even realize they are a**holes.