Please make a better client

If we get punished because of bad internet connection, that's okay, because you have no way of knowing. However, if your client is so bugged that we get errors regularly that is not cool. Why do we have to suffer because of your mistakes? In one of my recent games, my entire screen turned black because of your client and it was impossible for me to do anything. I had to restart my computer to get it working again. Please make a client that is much easier to tab in and out of.