Like, if a human meerely intends "to grab on anything they can to get out of the [human]-pile", & they're quite rude/destructive while doing so, they're still rude/destructive regardless of how sympathetic we may judge their intentions to be.
>is a phrase that describes a way of thinking best described by the phrase "if I can't have it, neither can you."
>Individually, the crabs could easily escape from the pot, but instead, they grab at each other in a useless "king of the hill" competition which prevents any from escaping and ensures their collective demise.