Endless "Client needs to Repair" pop up

Title is the most important, but last, of the 3 bugs i encountered in rapid succession.

The first was a bugsplat upon the enemy team -Assaulting our nexus -malphite ulting -URF Drake debuff ticking damage on me -popping barrier (I think) -and using Merc Scimitar Bug Splat. Decided to just let the end game pop because the enemy team was on our nexus and only me n malph were alive for the next 20 seconds.

Bug splat the moment end-game lobby pops up. Client shuts down.

Try to start it up and I get the "Files corrupted, repair initiated"~ish message, except when I clicked [ OK ] the message would chain pop up and wouldnt actually START the repair. Couldnt even end the task because the game would decide to relaunch for some reason. Had to shut down my computer, turn it back on, and am now in the process of reinstalling League.

League of Legends hit me in a 100-0 combo.