Clips like this, and the one where he's yelling at the top of his lungs, and throwing stuff, are direct proof of his anger issues.

Compared to the person he hates (that being Doug Walker), Doug uses his anger for comedy, he's exaggerating his rage for the sake of humor. Diaz doesn't do that, and I'm not saying he should, don't get it twisted, but this level of anger is not healthy, and again (CONT)