This isn't the main thing I wanna show you here, but if you haven't tried anything yet, look up a few guides here on steam community. There's a lot of helpful people out here and try some of those fixes first.

I ♥♥♥♥ you not, after I updated my motherboard BIOS, I could play about a dozen games without any issues whatsoever.
Before, I would literally have to pray that I would be put into a match and then pray some more so I could finish it without it crashing mid game.

Note that you can EASILY brick your motherboard if you ♥♥♥♥ something up while doing this. I would suggest looking up a guide on the internet how to do it for your specific model, tho most modern motherboards have it pretty straight forward:

• Find your motherboard model support page on manufacturer website
  
• Look for BIOS update file
  
• Download the file
  
• Copy the file onto an empty USB
  
• Restart your computer and boot into BIOS
  
• Find the update tool
  
• Select the BIOS file
  
• Wait for it to finish (Make sure your PC doesn't run out of power here/don't force shut it down either or anything like that. If it does, your motherboard might be a brick. Wait patiently for the process to finish. Shouldn't take more than a couple of minutes.)
  
• You're done

I know I sound like a broken record at this point, but DO IT AT YOUR OWN RISK. It's not hard to update it by any means, but you can ♥♥♥♥ up your hardware if you go in with no research and an empty skull.

Hope this helped.

See you in action, spartan.