On iOS I usually find AMP pages to be less usable. It forces a bar at the top and I can't easily share the link. Sometimes sites don't seem to work at all. For a long time any Reddit link on the Google Search results just didn't load on iOS for me.
I run an adblocker and use reading mode frequently. I do not usually suffer any issues with ads even without AMP. It is solving a problem I do not have and creating more problems in the process.
I see it too. I think it's my content blocker (I use Firefox Focus). Easy enough workaround: tap the link icon at the top, then tap the link, and you'll open the page directly without Google's bullshit proxying. Still quite annoying, though. Any time I do a Google search and there's a choice of AMP and non-AMP results, I go for the non-AMP ones. I like having pages that load fast and aren't full of junk, but not as much as I like having pages that scroll properly.
I run an adblocker and use reading mode frequently. I do not usually suffer any issues with ads even without AMP. It is solving a problem I do not have and creating more problems in the process.