It is great that engineers can choose between multiple services, but advertisers have far fewer options. Getting banned from Google means you lose Google search, Youtube, almost all of the display ads on the open web and most of the ad slots on android apps.
It is devastating and there is nothing you can do about it.
I understand where you are coming from, but good luck running a business without advertising. Especially if you want to create a new business.
The main problem is that most advertising is annoying or irrelevant to the user. Google search ads are usually the least hated of all ads because they are relevant and not annoying. If other ad systems could do a better job of adopting those qualities then people would not mind advertising as much.
It is devastating and there is nothing you can do about it.