I've already started. Most of my YT viewing was from the smart TV app, and since I can't block ads from there I simply don't use it anymore. It's still OK on PC, and on mobile I use Grayjay. On my TV, I just watch shows and anime nowadays instead.
Very strange. I've used Proton roughly as long as you have, and have never had any of these issues with the Android client. I send emails from my phone all the time, even important ones.