Downloading and running ad code costs more money than just paying and installing an ad blocker, especially since they're incredibly cheap if not free.

You can't afford a one time purchase of $1.99 for Wipr on your iPhone ?

You can install Firefox Focus and select that as an adblocker for Safari. Alternatively, DuckDuckGo has an iOS browser with built-in adblocker.

AdGuard is quite usable without subscription.

BlockBear is free