Is it entitled? Most would agree, "very" (but that's not my concern nor judgement to make)

Did the maintainer screw over people that were using Actix? Very likely.

I sympathize with both sides here. I've been the unthanked, punching bag contributor on a few notable projects, and I've been a user of software whose leadership got into drama and squabbles, that ultimately fucked me over.

There were times that I pulled certain projects and essays, that had greatly helped people, and taken my ball home because I was fed up with the people I was catering to. There is no correct answer here, dealing with people and their emotions, but there is a way for both sides to handle things without contributing negatively to other's lives.