I recently switched to Wipr [0]. It’s dead simple to use, and will auto update its filter lists in the background. It’s a one time purchase, not a subscription.

Adguard [1] is a decent free option.

I also use a Pi-hole [2] on my network. That blocks ads in apps (not in the browser) like Letterboxd for example.

[0] https://kaylees.site/wipr.html

[1] https://adguard.com/en/adguard-safari/overview.html

[2] https://pi-hole.net/