If your main reason for paying premium is for ad blocking, I’d suggest just cancelling it now and using ad blockers. If you want to support creators, I’d say that it’s better to cancel and subscribe to a few patreons - I’d pick some of the smaller creators you like, to spread some of that support around a bit.

If you use iOS devices for watching YouTube, look into side-loading uYou+, it’s basically an edited YouTube app that removes most of the ads. You can stream from your phone to the apple TV, too, also without ads.

Not sure what the android equivalent is, but someone else will know - hopefully they will share in the comments also.