Can you please fix this client.

So this happens now like every day. I lost like few ranked games cause my client went black and he didnt respond nothing, I was in game i was 94 percent in game like it will load but i didnt my game didnt froze at all it was loading but it didnt wanna load so i was waiting and than realize my game started 5 minutes ago i am sure in it and i turned off my client and ye there were -19 lp gg such a good client.