If you're having problems with Youtube's new attempt to stop you using an adblocker, you might be using the wrong adblocker then.
uBlock Origin (yes, Origin, not uBlock or uBlock Plus or any crap like that) has not once failed me in keeping this new shit away completely. I have continued to have a flawless YT experience as uBO's update pace has been breakneck. Every 'fix' that is community posted ends up being already incorporated in some way into uBlock Origin. And if anything gets through, it's entirely because my copy of the addon hasn't updated yet, and is likely in the middle of doing so.
Between this and SponsorBlock preventing me from seeing any undesired in-video ads by just skipping them, I've truly had an ad-free YT experience for years at this point, and it hasn't stopped yet.
Here's me hoping that Youtube is basically forced to either relent, or to destroy their profitability trying to combat people's ability to watch their videos without ads.
No matter what you think, they cannot win. Literally. Even if it's fully paywalled - that's what piracy is for, babyeeeee.
They cannot win.