More bugs with this horrible client

When you start league, and go into champ select do ur business and the game starts up, some times itll say direct x unknown error, and be a black screen. well i noticed some times 2 league symbols will be on my windows thing, and one says reconnect to game, while the other is a black screen. When this happens, and i restart my computer (which fixes it) other people will not be in the game, 1-2 others, and they say it gets stuck at loading.