...you're just taking this too seriously. Not everybody is going to be a Master or Grandmaster or Pro. I have a blast and I just mess around in Gold.
If you're not having fun, you're doing it wrong. Take a step back and look at what you're hoping to accomplish. The whole point of having games on your computer is to play them, to entertain yourself, to de-stress, to relax, to have fun.
Do something different. The whole game doesn't REALLY revolve around competitive ladder 1v1 games.
You can even take a break and play other games for a while and come back in a week or two.
Or maybe you're just done. Maybe you have gotten everything out of SC2 that you can, and it's time to move on.