Nothing serious, but he's well known for being impossible to work with. He has gotten into multiple arguments because he refuses to follow kernel development rules. When called out on it, he makes a big stink about it. Obviously his code doesn't get merged. Then he does the exact same thing again 1 month later.

He has gotten into multiple arguments with Linus Torvalds over his refusal to simply follow the kernel development rules. During those arguments he has made cheap shots at completely unrelated people, which then drags those people into the argument.

It's gotten to the point where apparently a significant portion of the kernel developers feel like he was negatively impacting the kernel, and Linus eventually removed his code from the kernel.

He's what you might call a Linux lolcow. And now he's doing even more lolcow things by... Getting weirdly attached to his LLM-sona