I used to make my projects open-source when I did not want to deal with them anymore. The plan was I am not going to change anything anymore, but the project is

I used to make my projects open-source when I did not want to deal with them anymore. The plan was I am not going to change anything anymore, but the project is too useful to delete it, so someone else can make future updates. But I do not do that anymore. I did not find someone else, instead more people send me issues and I have to spend 100x more time on the project than before I abandoned it. However, now I work at an university and there you are expected to make everything open-source