My big problem is banks and satnav.

SatNav need traffic info and there is none, so their routes are bad.

Banks require apps to even use their website for "secure codes". Those apps try to detect ROMs and refuse to run, not even really being Android is going to make passing that harder.

Let alone random things like parking apps where the app is the only way to pay.

This is a political problem as much as technical. Competition is basically dead. We need government to step in and make competition possible. But they are in big tech's pocket and the status quo suits them too. Voters either don't care or believe what big tech says. It's a mess.