That may be, and he never mentions this in the now famous comment. Or was the message about Lutris being slop a harrasment? (question is genuine, I am somewhere in autistic spectrum)
There was a lot of toxic conversations in Discord and on the forums for a while prior to his blowing up.
The dev hasn't made a secret of his mental health struggles and he probably could have handled the situation a bit better. But, in the end, he's a guy making a tool that helps the entire community and even if you think AI tools run on the blood of sacrificed puppies, it isn't okay to harass someone personally.
Argue about water usage or power usage, copyright issues, etc... but as soon as they start attacking the person directly it has gone way too far. His response could have been better, but the blame should be completely on the anti-ai harassment squad and not the lack of PR skills of a volunteer developer.