won't close

Summary: I cannot get past the launcher as there is nothing opening after I click "Play" or "Play Now" however it is phrased. It loads a bit then stops, and sits in the background and there is no way to close the application other than restarting my computer. I have tried many fixes such as...

So, as I've said in previous threads the game is currently unplayable, but even worse, every time I attempt and then close the game (or it crashes) the game continues t run in the background and doesn't stop unless I fully exit Steam. I've been looking forward to this game for ages and I've not...