I have so many problems with nextcloud! It kills itself from time to time, often during updates. Randomly problems with folder rights when everything was workin

I have so many problems with nextcloud! It kills itself from time to time, often during updates. Randomly problems with folder rights when everything was working before. It's slow and the code is php. The official documentation and forum are a mess. I have a lot of files, the database is not able to handle them correctly, even the cleaning commands take hours and do not work.. I regularly lose files in the database and need to re-upload them from the file in the server.. The app on Android has a lot of issues synchronizing my files, too many too often I guess. I'm hoping to see a good alternative to nextcloud one day.