It's easy to get any bug fix you want: pay for them.
If you think loading your expectations on to an unpaid volunteer and then harassing them over it will work out, hopefully this moment is a good learning experience for you.
(Unfortunately, I can see from reading the comments that not everyone is getting it.)
Perhaps someone should create an OSS contributor agreement where contributors explicitly agree to work long hours, for free, in perpetuity, prioritizing issues based on reddit heat, and see how many developers agree to those conditions. Those are the expectations that appear to have driven this developer to quit their project.
BTW, for those that don't know: acting on bug reports and accepting pull requests is often a lot of work in its own right. Bug reports are often vague, incomplete, contain incorrect assertions and assumption, lack clear steps to reproduce or even a clear description of what happened vs what was expected. It takes time a effort to clarify these things. Even then you may need to, e.g., build an environment to reproduce or correct the issue. Changes from developers that aren't highly experienced with the project typically have gaps, new bugs, misunderstand requirements, don't build, ignore style conventions, lack unit tests, and have various other issue that have to be ironed out before the change can be accepted. It's all a lot of work.