The problem was when people came like "I am using this library, can you debug my code?" and pasted a 500-liner, or like "this doesn't work on my XYZ system, fix it", or when they were just rude or demanding.
I've met some wonderful people BTW, and would also not trade that for anything.
Some users are overly entitled, but some maintainers are self-absorbed douchebags. I've seen both sides.
Even if they close all issues with no comment, they have given you a such _massive_ head start vs having to write the entire project yourself from scratch. How can you be anything but grateful?