Some suggestions for the People part:The balance
The few euros I receive in return for what's being offered and the fun of developing things are no compensation for the thousands of questions I answer every month, for unfair Play store reviews and for stress about unclear Google requirements.
Core problem
Google. There is no sensible way to appeal in case of bad reviews or alleged violations of Play store policies.
People. They are generally pretty demanding and on the other hand everything should be free.
Myself. An old and grumpy developer, who maybe should retired.
- first-level-support: instead of answering thousands of questions yourself, redirect them to a support thread on XDA where users can help users.
- community managers: find volunteers to help you with bug triaging (e.g. via Issue Templates on GitHub) and PlayStore review handling. You would only have to deal with actual bugs and reasonable feature requests from there on.
This might shield you from negative people and let you do what you love: focus on writing excellent apps.
Thanks for the many hours you have put into this!