When we say "break up" in the context of Google... what do we mean? Geographically? By "vertical" like Gmail & stuff, YouTube and search, advertising & making money, waymo and other loss making operations..?
I'm not sure what the solutions to all the issues are. But, apart from the issues around privacy (and I'm not sure the conventions we're aiming for are great on privacy anyway), we just can't "physically" own our data individually. That's not how data works. The data from lots of cars driving around can become a self driving car program. The data from you driving around cannot (never say never though). It's data's qualities at scale that are being discussed here.
Amazon knows what and how and how much who buys, at scale. If an allegation/indictment is made, it will/may allege that at Amazon scale, this is monopolistic.