Lois
And when he gets pinned in an environment where he has to be able to protect a human from a monster, do you really think that he's going to be able to maintain enough sense of self awareness to avoid accidentally hurting the person he's looking out for? Even by grabbing them and pulling them out of the way, he could severely hurt them.
There are better ways to deal with frustration than hunting down monsters and endangering people who need saving.