There are plenty of apps that let you do your own thing. Don’t blame the software for musicians being derivative. People have created amazing digital music with significantly less technology. Maybe you just don’t like that people without a formal background (rich people) have the opportunity to make bad (and good) music.
It sounds like your only problem is that you have to use the App Store. So what app was denied by Apple but is available on Android? Yeah, I didn’t think so.