Can you fix back your client and game please?

Please revert the client to the old engine, the new engine still creates memory leaks and does not allow me to pick anything in champ/ban phase. I just got a 30 minute dodge timer because of it. I cannot see my friends list, nor can i see chats. URF is also unplayable due to lost frames, it legit crashed my PC yesterday. It is not my PC as I have been playing league fine for the past year on this desktop with 120+ fps.