Those are far from harassment,those memes are just silly and dumb even if they're done mocking him.
Honestly none of this would happen if he just had a clear vision for his game and finished it and even less if he didn't act like a man-child.
There are other devs who went through much worse and got their job done,meanwhile his only achievement in his dev career is just a cluttered mess that feels outdated from the get-go considering it started when there was the "Simulator" craze.

I had sympathy for this guy for a long time. What caused that to end was a demonstrable resistance to the idea of self-improvement. He had an idea that would've made a good game a few years ago but never built a team large enough to make it a reality.

That all said, cyberharassment needs to stop. Its too common and it only happens because its impossible to install functional safeguards against. Harass the guys making the rape simulator on Steam and leave the weebs alone.