"Just stop using their stuff."
Without legal roadblocks, they have the power and you don't - and you won't be able to stop using their stuff. Just look at how Google's captcha system is infecting the internet.
DoH is a classic example of a few powerful companies trying to obtain control and force you to use their stuff.
With DoH bypassing ads filters and the like, they will also be free to pump more ads and slurp more data about you. Enjoy!