Having never had a google account or used the "play" store, but having only used android phones(so far) I would try this from fdroid, etc.
I have a workarounds that dissables all notifications except for pm's, the trickiest ones bieng for the varios google (dis)services.
The other main workaround is to use webpage sign ins rather than apps through an oddball browser that breaks anything........hmmmm, too agressive, which luckily comes in another flavor that I have set up for banking, and certain other sign ins.
But what I would realy realy like a cache cleaner that would wipe EVERYTHING , or better yet a detailed list of all running services and cached data AND bieng able to see the network. could be called WTFIGO, or FIGO for short