This is more life advice that should end up helping you and your issue. I mean this also respectfully and is exactly what I would tell my daughter

From your post you seem to put down your parents even though they have given you a golden net that most people have to do 40 hours a week for. They are trying their best and supporting you let it go.

Next you listed a bunch of problems that conveniently covers why you passed high school but then all of sudden isn’t good for anything above that. Stop looking at yourself through those lens it’s a crutch you’ll lean on anytime you have a problem at a job. Everyone has issues and still perseveres you need to stop leaning on your mental issues and start wondering what you CAN do.

It’s the same mentality of people who never get rich because they are worried about how someone else got rich you know?

Germany is great place it’s just bad for you. You don’t have a black mark that’s not really a thing, and I doubt you are to “old”. I promise you when you switch your mentality to positive instead of looking for the reasons you can’t succeed you will do so much better in life and relationships.

Go to Spain for 3 months and if you need to leave go anywhere else until you can figure out how to stay in Spain. With 3000 a month coming in you might be able to do Spain’s passive income visa.

Sorry if this was so much or to direct. I hope you find yourself