Their Hangouts app sucks. I don't know how people in the U.S. use it, but here people use it only for SMS, and they crammed everything in that so it's hard to do the main function. But not to worry, they made Messenger too. So, if you're a sane person, you disable Hangouts, install Messenger and all is good, right? Of course not. Because since the 5.1 update, every few minutes you get a nice message that says "Hangouts has stopped unexpectedly". You know, the app that you supposedly disabled because you have no use for. So you enable it again, and the message goes away, and the app just stands there, unused, taking up space and memory. And by the way, why do they feel the need to make two or three different apps for doing the same thing? Photos and Gallery? Why not. What about Email, Gmail and Inbox? Sure, my app drawer was a bit too empty anyway...
There's so much more that could be said about Google "products" (I hate this word) and their problems, but my blood pressure is already acting up, so I better leave it for another day.