He's trying to emulate his idol.
This Pedro meltdown is so similar to the hopeless, unemployable, alcoholic Pitt's biennial drunken GBCW rants.
McGrath has a similar opinion of himself, and he's now permanently unemployed.
He hasn't yet given clear evidence of sexual perversion or alcoholism, but just wait.
As soon as he checks off those two, he'll be the Connecticut version of Pitt.