To me the most annoying part is everyone is so entrenched in youtube they either need to accept its a service they should pay for or start looking at migrating. There cant be any viable alternative if there isn't an audience.
They have a few problems like demoneytising for arbitrary reasons, over zealous moderation on some topics and almost zero on others - I think things are starting to relax a bit but there was a time where history channels would avoid saying the word Hitler or Nazi in their documentary about ww2. Likewise if a film or news story has someone 'commit the unthinkable' and 'unalive themselves' it can make hard topics much more difficult.
There's a lot of engagement spam too, so many channels doing fake restorations, fake pool building, fake animal rescues... Then the ones which just have an ai voice reading fake stories from Reddit, chat gpt gibberish, or awful old jokes copy pasted from old books.
There is amazing content too though of course and I think it's by far the best place to get entertainment and education resources
There are multiple workarounds for YouTube ads like Revanced on Android for example. On Computer I didn't encounter any issues for using the uBlock Origin extension.