Youtube Revanced also works for me and should be the most convenient solution.

Also Brave on Windows/Desktop

You can install your own precompiled Android, make shure the reciever does aswell, host an end-to-end encypted messaging server on your own and you are set. Maybe use thor browser aswell, but that shouldnt be necessary

You simply dont get an Iphone ;)

No but seriously the “spy on the other users phone” is something you got a point about. But isnt that a genuine issue if you use non-open source code on your phone? Like if you go that far isnt anything other than stock android that you compiled yourself unsafe?