My client actually just straight up died

How is this client THIS bad. I have been playing decently all day in NA and EUW, I log into NA again to play with a group of friends, we get into a game and it just fucking critical errors. Over, and over, and over. I hextech repair tooled the game 4 separate times, reinstalling it didn't even fucking reinstall it for me. I finally got the client to even OPEN and it had the reconnect button, it just let me smash it over and over with genuinely no results. The old client wasn't like this, man.