How the @#@$ is Gambit getting uncharacteristically knocked the @#$@ out by someone running directly at him charming exactly? To anyone? They recognize the fact that he's taken on a man in Wolverine that has beaten Captain America to within an inch of his life, and freakin' Gladiator, our closest comparison to Superman (before we got Sentry and Hyperion) but say Gambit's arrogance or overconfidence got the best of him which led to his defeat? I can count on one hand with three fingers to spare where I can remember him being overconfident in battle, it's hardly a character trait worth highlighting when trying to justify that Avengers fluff piece of a story. Nick Fury says he's one of the best hand to hand fighters he's ever seen, Iron Man's computers can't keep him targeted, he catches Spiderman off guard (HIS POWER IS TO NOT LET YOU CATCH HIM OFF GUARD!) while fighting him hand to hand, and fights Daredevil and Blade to draws; but Captain America can fight him while not even paying attention to him?
I think the point they were making is that it illustrates all the things that make Gambit great as well as his flaws. Here he is going up against the iconic Captain America and he doesn't flinch. He's the same cocky dude with the swagger that says to him he can take down the leader of the Avengers. At the same time that cockiness and swagger is what ultimately leads to his defeat as he doesn't quite get the charge right to completely knock out Cap.
From an objective viewpoint, I can see their point and actually agree with it for the most part. It's always bothered me a bit that Gambit seemingly knows the exact durability of his opponents to know that using 52 cards on Gladiator is going to merely knock him out rather than kill him outright. No matter how skilled someone else, they can't really know the full limits of an unknown opponent. So without knowing exactly how durable Cap is, it's entirely possible for him to get the charge wrong particularly if we assume that Gambit is going to err on the side of caution as he generally doesn't want to kill anyone.
Why I ultimately still hate this scene is how dismissive Cap is of Gambit. I think at one point he's on the phone shooting the sh*t with Iron Man and he acts like Gambit is no real threat to him. Considering Gambit could easily have gotten the charge wrong by putting too much in it, I think that attitude from Cap makes no sense as Cap could have easily been killed.
So I agree with the author's larger point but I think it ignores the fact that the scene is poorly executed.