The guy removed the attribution because he is being harassed
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)
The ‘fuck you’ move is the people harassing an open source dev
That is not a decent behaviour, no questions. His doing something preemptively in regards to something that he says he doesn't see as an issue - that's some bullshit. I am not against him using llm tools, but I am not ok with someone who can't just say "this is how I am doing things, these are my reasons and they are enough for me, so fuck off (and/or be banned, if GitHub has such a thing)" and instead goes on with some ill-reasoned tyrade. Before anyone brings this up: yes, he also mentions depression, which is no small thing, so demanding crystal-cut reasoning is also bullshit, but that is not my point, the latter being that the guy needs some care, and doesn't look like he understands that. Which means things are heading towards a disaster, sadly