Patch 4.21 broke League for me
EDIT: As of now, this problem has been resolved. For those still experiencing the issue, it has to do with incompatibility with LolReplay; closing the application and rebooting should solve the problems.
Title says all. Tried to play a game earlier today and couldn't connect at all, and when I can connect, I get hit with an Attempting to Reconnect screen and 1 FPS. The FPS WILL go up to 60 FPS if you don't move or take any actions, but when you click to move or do anything, it drops again.
Yes, I have repaired the client. Yes, as you can see from the default settings, this is a completely fresh reinstall of the game. Yes, this is consistent through every game (the one PvP I tried and the five customs). No, it isn't my computer or internet (150Mbps on ethernet for the win).