By not consuming intrusive ads, and by not buying products promoted with unethical practices.

You can't possibly defend the current state of private spying and surveillance, it's dystopian. The data collected is sold (directly or indirectly) to bad actors, and is ripe for abuse. You can't just say "deal with it or GTFO", ad blocking is the only recourse we as consumers have to voice our opinion.

It's not - you can prefer paid services over advertising-supported services. Buy a physical magazine rather than a digital subscription. Etc.