In the Daredevil series, Punisher tells Daredevil himself that the latter is just one bad day away from being him.
That means to say, should a hero reach his limits, he'd lose it and be like, "Fuck this. Fuck people. Let's hurt them instead."
I think the statement holds true.
I mean, aren't we all one bad thought away from runining your day?
Just one little trigger is all it takes. A barrage of negativity and onslaught of ruminations would ensue. A revenge fantasy unfolds itself like a movie premeire. Hopefully, you don't act on them.
Perphaps then, it's our duty to watch out for ourselves and not let things snowball.
We gotta let it slide somehow.
It's just one thought after all. You've hundreds of thousands of it everyday.
Maybe try to make most of them be kind to you. You're in control anyway.