The point is that they aren't invulnerable demigods or superhuman or anything. And if I encountered them the way Egwene did, in an extremely advantageous setting, with a shit-ton of allies, some of whom claim superior skill in that venue to the Forsaken, PLUS a ta'veren friend wandering in dragging a mcguffin that prevents my enemy from retreating... Yeah, I'd pretty much EXPECT a victory, and be mortified if I couldn't pull one off.

Egwene has had months of training in T'A'R from the best experts in the world, and has an innate Talent for using the place. Contrast that to Rand who took on a Forsaken with superior knowledge and training in T'A'R and was able to win, with only a single allied distraction, and no super-camouflaged Wise Ones or getting minions killed (it's an "atrocity" when Elayne loses cannon fodder, but when Egwene loses some of your so-precious channelers in battle, she's a great hero? ), or dreamspikes to trap Rahvin.