Question: If Superman were real and he snapped and went crazy and started killing people, what would society’s options be to deal with the threat given his powerset?
Answer: There is only one option, the exact option The Avengers were incapable of using against Thanos, thus wasting all of their superpowers combined: unity!
The power the disjointed, vastly diverse, bickering and hateful Human beings could generate – if they rose above their instinctive behavior, attitude and built sustainable mutually responsible,mutually complementing connection above and despite their rejection – is unparalleled in the Universe.
And with or without Superman “snapping” we will have to use this collective superpower in order to survive. Otherwise even without Superman going rogue our own “cancer-like” nature will finish us off real time.
Entering The Force-Field 