Hate Systemd?

No, I don’t :)

iOS 15 (2021) introduced support for actual extensions, not just blocklists. These extensions can inject scripts on the pages you browse and multiple adblockers on iOS make use of that, including Adguard, uBO Lite and Wipr for example.

They still use the blocklist API for their regular URL blocklists, but can run scripts in addition to that. Never saw a YouTube ad on iOS ever since, for example.

There are even userscripts extensions (think Greasemonkey compatible) available. It’s no problem.

macOS is included with every Mac, not free.