You've followed the advice. You've set yourself goals. They're SMART. You keep a list of them which you check regularly. How's that working out?
If you're like most people you don't reach your all your goals. When you do you feel good for a bit, then wonder if that was the right thing to do after all. When you don't reach them you feel bad about letting yourself down.
Both of these things make you miserable. The problem isn't you. The problem is how you're using goals.