Crashing Upon Entering The Game

So when I enter a match, the game instantly crashes and boots me back to the client where it asks if I want to reconnect. It lets me click on reconnect just to crash again. Over and over again. I changed literally none of my settings from last night, where it did admittedly just refuse to open the game then and didn't even eject me, but I've now also reinstalled the client twice trying to fix this. Help?