The impulse to whine is powerful, not just because injustice rankles so much (not just in our species, see below) but also because wiser perspectives, such as wisely understanding that the truth will prevail, don't come easily for most of us. FWIW, I've found that complaining, like flame wars, ultimately makes me feel worse than simply shutting up, so I try to shrug off the slings and arrows, for my own sake. I'll get to the wisdom part when I'm (even) older.
My public service announcement for today! 😀