go from one extreme to the other
To change or shift between two very different states or things. A: "Why's Mom so upset? I thought she was happy that I moved out." B: "Yeah, well, you know Mom—she tends to go from one extreme to the other." Snow one day and 60 degree sunshine the next? Boy, the weather around here sure can go from one extreme to the other!
go from one extreme to the other
to change from one thing to its opposite. You go from one extreme to another about Tom—one day angry, the next day perfectly happy.