As somebody who has professionally done software for Android (and iOS and a lot of other things all the way back to very early dynamic websites with CGI-script backends) I would say that the biggest enemy of Android is the increasing bloat of each new version of the framework as it was not designed well to begin with, has “evolved” by layering stuff on top of stuff and has had multiple changes in the way it’s supposed to be used (in the professional lingo, “at the technical architeture level”) so it’s been a bloated mess for a while.

The result is a slower OS which uses more memory and storage and ditto for apps made for it, and they’ve even managed to fragment the developer community (by adding a 2nd programming language, for no reason other than to copy Apple in doing so) and frankly I see no sign at all that the bloatware-framework trend will stop, much less reverse (my - granted, limited - experience with Google Technical Architects is that they’re not really qualified at that level)