Well, if YouTube were truly so terrible that you think it offers no real value, you wouldn’t use it at all. If you yourself don’t use it, that’s all well and good, but if you do still use it anyway but block ads, then you’re admitting that it offers some amount of actual value while refusing to pay for it. In that case, it’s hardly unreasonable for YouTube to decide to not take on the cost of offering the service to those that aren’t going to pay for it. You’d probably be more than a little annoyed if your boss told you that you’ll be working extra hours for free.