rawstrophobia

(noun) Extreme or irrational overcooking of one's food out of fear of undercooking it. This overcooking often results in a worse finished product than the undercooking would have.

Noun: rawstrophobe
Adj: rawstrophobic

Dubs' steak was tough, chewy and hardly edible. In the face of getting bullshit from his friends, Dubs defended his cooking as how he meant for it to be. Dubs is a closet rawstrophobe, one of the most depressing forms of rawstrophobia.