> Poor UI guidelines cause serious problems
> Doesn’t always recognize wired headphones when they’re plugged in the first time. Sometimes even the second time.
> Max volume is rather low for wired headphones, and there doesn’t seem to be a way to increase it.
> No decent Photos app alternative, except Google Photos but apparently with a lot of issues (I'm paraphrasing this one, it's really long)
> Google Wallet does not support NFC payments due to restrictions that Google imposes
> App Store madness
I recognize that some of those are features and not bugs for some users, like the "App Store madness" and the lack of a Photos app alternative, but overall those seem like huge gaps that make it a non-serious alternative.