There's a lot of people here who act like the only ones annoyed by this are people who refuse to pay for YouTube premium. But here's the thing... /I/ do pay for YouTube premium, and I still find this annoying. Here's why: I'm not always logged into my personal Google account on a device, and I don't necessarily want to log in on some devices to my personal Google account, but I still need or want to use YouTube. YouTube /is/ a wealth of information, and it's worth paying for, but that wealth of information often extends into topics which are, for instance, relevant in the workplace, but I am not going to login to my personal account on a work device.
Increased ads affect everyone, not just people who don't pay, paying only limits how it affects you in /some/ ways, but not completely.