Completely Remove Steam From Computer?

Steam recently messed up on me last week. Now, I have to wait around five minutes to log in. If I click on anything while logging in, Steam will crash. The same thing happens while launching a game. I've looked all over and have found several ways to fix it, but none of them work. People tell me "Well don't click on anything and it wont crash and you'll be able to log in or play your game." That isn't the case. It never did that before, there is no reason it should do it now. I've tried uninstalling and reinstalling Steam, that did not fix the problem. I know most of the time when you uninstall something, it doesn't completely get rid of every file that it created or it installed. Most of the time, it just gets rid of the files that it installed in "Program Files" and/or "Program Files x86" and I want to erase everything, so I can try to do a clean installation of Steam. I'm talking about if there is any files left in my Registry or Appdata folder, I want them removed.So does anybody know of files that stay on your computer after it uninstalls? I already deleted a Valve folder that stayed in my Registry after uninstall. It was located at HKEY_CURRENT_USERSoftwareValve