For instance, since Android 5, the standard contact app doesn't allow you to modify a contact which is not synced with an account. Why even do this? The list of tracking settings that can be turned permanently on, but only temporarily off is ever growing. At some point, you just give up because it's such a silly waste of time. Google knows this very well.
Almost all the google websites, except google search, work badly on anything except chrome. I mean, google groups is rotten already on chrome, but just try it on firefox for the full experience.
Maps (the website) used to be a game-changer in the past. It was insanely fast. Nowdays I hate it. The UI is just horrid. On Firefox it just misbehaves constantly. I only use it for streetview, and still I'm appalled at how badly it has evolved.
They are pushing still impressive libraries and tools. But there's not a single of their products I still like to use.