I just want something that is compatible with every service/app and always streams reliably. Is that too much to ask? Even Chromecast can't pair with some app

I just want something that is compatible with every service/app and always streams reliably. Is that too much to ask? Even Chromecast can't pair with some apps (and can't act as a Bluetooth audio receiver leading to constant confusion from users whether they are pairing or casting). Eg. it's really hard to cast a local video/mp3 file unless you know what you're doing.