Setting up an ad blocker for a whole device often requires root. I gave up with my new phone and just have ublock origin on Firefox but that's the point. I can't easily install something that will modify the DNS because I have no admin access on my phone.
That's why I also do give up on certain apps. For example I don't like the ads in Boost so I stopped using it. Sometimes I pay for the version of an app without ads. This doesn't happen on Linux.
Also being heavily pushed towards apps for websites like YouTube, Twitter, Reddit, Facebook... Lemmy, Mastodon... They are all "best experienced" in apps, and most of them will probably try to push you ads or make you pay.
Again, I'm relatively tech savvy so I can find other ways, but it's still annoying and disappointing to have to constantly find ways around the system. It doesn't happen in Linux.