Why do I get mad after losing a game?

When that happens, I get emotional, mostly I get angry when I lose. I absolutely can't stand that. If there's too much of this for me to handle, I tend to lose it. And by 'it', I mean I lose control with my emotions. My hatred of losing made me feel bitter, and when I had too much anger and rage on me, I became a rage-o-holic beast. I became very impatient and my impatience grew bigger and bigger, and when my patience has COMPLETELY ran out, I became as mad as The Incredible Hulk, maybe 10 times as mad. The point is, I'm in my 20s and I'm autistic, that's right, I have autism, and when things don't go my way, I lose my temper most of the time, and then I get depressed most of the time.