Nextdns is awesome and I highly recommend it. That said, DNS level ad blocking is pretty limited but it often is enough for journalism sites like this one. You also get privacy benefits since it's quite good at blocking trackers and even bandwidth improvements since your device spends less time spewing logging requests.

I use DNS level blocking on my home network at the gateway level, but I also use AdGuard Pro on iOS for my powerful ad blocking. With this level of ad blocking you can do more than what DNS level blocking does. There's rules like "hide any element matching this selector" or "block XHR queries to this particular path". (though still not as powerful as uOrigin blocking! Which you need for big sites with anti-ad-blocking measures like YouTube or Facebook)

tl;dr; There's lots of options for iOS ad blocking and they're great for dealing with spammy sites like this one.