Game freezing -- can't alt-tab or do anything other than restart game

For the past week my game has been crashing in the middle of a game constantly, requiring me to restart my game and load back in. The only thing that's movable is my cursor, and I've lost games, exp, and CS because of this, and otherwise winnable games quickly became impossible because of the game crashing and me dying because I'm left in the position I was in before the game crashed. I've noticed that this is happening to other people too and the fact that a game breaking bug like this hasn't been fixed quicker is really disappointing.

Please fix your game.