Are you on android? So this exists It is the app you’re talking about, they just carefully don’t mention that to avoid obvious illegality. I’d also check out https://revanced.app/ for YT. The patcher also supports a number of other apps these days, including Spotify and Twitch.
These are slightly technical tools that will probably take you 10-20min of reading to understand. In think that is worthwhile to not hear ads and not pay a monthly subscription. But everyone has their tolerance levels.
You’re like 5 years late on this realization. Unfortunately not much is changing.