Blame for different things:

Running around and cursing anyone using llm - that's an idiotic thing to do, and he is not the one doing it, of course

not the lack of PR skills of a volunteer developer

That's not what bothers me

But, in the end, he’s a guy making a tool that helps the entire community

While sacrificing his own life (time, energy, emotions, all it takes to keep doing it). That's not worth it, damn it. Doing something just to say "good luck figuring this out on your own, if it bothers you that much, you stupid fucks" is a priority shift from "what is good for me/project/community" to "what to do with project to stop this toxic shit". My answer is "Do nothing with the project. Get them to fuck off or get yourself out of their reach". And my requirement of anyone in charge of anything is clarity

Edit: word "sacrificing" is important. Not sharing out of abundance, not serving out of devotion, but cutting from what he has and needs for the benefit of others