I always feel that way when I lose in ranked against A-Ruby players. It doesn't help when they overkill -_-. Maybe take a break, or just play some offline modes like arcade/survival?
That's good idea, I never play offline modes anyway(except Training). I just need to change my attitude a little is all. It takes one bad day for me to be a little depressed, I just got to pretend they never happened and move on now.