> If you don’t want to be tracked stop using sites that track you
Can you even tell that before being tracked? The GDPR attempts to make tracking opt-in so that you have a way to consider the downsides before agreeing. There's technically no problem with targeted ads and data collection as long as users are given a clear description of what data they're sharing and how it will be processed.
> install ad block
The same people behind all this illicit data collection would rather not have you do that.