YouTube broke even sometime around 2010 and has been profitable ever since. The ad revenue has always been more than enough to sustain operating costs. It's just more growthism = more ads. If you want the YouTube of 2010--you know, the product we all liked and got used to--you can't have it. Welcome to enshittification.
Personally I find YouTube unusable without an adblocker. On my devices that don't have an ad blocker, it's infuriating.