You say that they are relevant as if that was something to be proud of. You've had to track users across all the internet to be able to show relevant ads, so relevant ads disgust me.
People somehow think that if you get rid of ads the surveillance architecture will go away. They say “if you’re not paying, you’re the product” but the converse is not true - you could be paying and STILL the company could be collecting your data, such as ISPs.
We need full end to end encryption and decentralization! Everything should be opt-in by design.
The former evaluates the context of the content being delivered by the server, while the latter evaluates an encyclopedia’s worth of data (both inferences and known traits) about the user.