If you're on Android, try a firewall-based system-wide adblocker like Blokada (https://blokada.org/index.html). It's very effective at blocking ads, including on mobile Chrome, and it's grandma-friendly (doesn't need root, nothing to maintain)
There is a "Brave" browser which is chrome with ad-blocker. But I prefer firefox on all mine devices because of syncing passwords, history and ability to send tabs from desktop to mobile devices.
Is it really true that they are not allowed on play store because it interferes with googles business model ?