I don't believe this guy. Of course his first post makes it look like he is an inncocent victim but then there are also these comments he made:

Suddenly you just start getting completely excluded from group events, they start making excuses or lying to not hang out with you when really they’re just spending time with someone else.

but when you spend every day for a whole week asking a lot of people if they wanna do something, and they’re all busy and then you see on social media or hear later that they were all having fun group adventures without you on those days, or they make plans with you and then bail at the last minute for something more interesting,

If several people "suddenly" start to avoid & exclude him then the problem is he himself and his behavior. Either there is something he isn't telling or he doesn't realize that it's his own actions drive people away.

If you run into an asshole in the morning, you ran into an asshole. If you run into assholes all day, you're the asshole.

He doesn't even talk about what he might do wrong. He is blaming everyone else for his problems. Nothing is his fault, it's everyone else who is mean to him. -eyeroll- I call bullshit.

This post is 100% not the whole truth.