I learned from work inside an open source project during the last years that many people are not willing to really support you, while you are doing the work. They show nearly no interest in your volunteer work up to the point when something didn’t went smoothly. During the periode everything went smoothly you won’t get an acclamation. But in the opposite you will see a lot of people always pointing on you. And maybe they pick on you. I got this experience. And there were nobody inside the project who stopped this.
At some point leading members of the project spoke about my volunteer work in public without discussing requests and issues first with the one who did the work (me). That was the last straw.
I stopped my contribution to the project immediately. I wanted to preserve my nerves and spent my spare time in a different way after 16 years.
There is no need to complain on a bus factor, if you are the source of it.
And I read that the project will spent more donation money on the creation of a new framework and administration. It seemed the current one was to cheap because of my contributions (volunteer time). Lesson learned: only expensive things seemed to be invaluable ;-(