While it is no secret that exploitative practices are interlaced with capitalistic tendencies, the practices are becoming intolerable. Signing up to pay usually takes only two clicks that are prominently visible whereas cancelation options are hidden away in deep settings requiring multiple clicks. Pricing often feel arbitrary with no reference points. Every large company grows with the intention of exhibiting monopolistic behavior. This is not sustainable and should not be tolerated.
The “best” you could do in this case is use ad blockers, don’t use an account and never interact. Even a negative interaction counts. It’s all “engagement,” even if negative.
I installed a Channel Blocker and got into the practice of opening unknown videos in Private Windows. For some fucking reason, YT seems to think I want to hear about people complaining about being suppressed by the algorithm. I would leave nasty comments for those videos if not for the fact that, like you said, any interaction counts as “engagement”.