Think I’ve mentioned elsewhere: Klingons may get individually beaten in multiple skirmishes, but ever notice: almost every time there’s an actual full-scale war with the Federation — DISCO, “Yesterday’s Enterprise”, DS9 — by the end, things are going badly for the Federation, which is only saved by a plot twist, not combat. The Klingons may tend to lose individual battles with brilliant hero captains, but they’re good at outright war, and that stands to reason.