Let me tell u what makes this scene so great. It’s the fact that Steve has a match, an equal. He mows down the goons on the Lemurian Star, escapes SHIELD HQ by fighting 15 people in closed quaters, jumps off a buliding and blows up a plane, then within hours he meets up with Natasha and survives a missle strike. He has no match, no equal in this world. That’s what happens when Batroc challenges him - this scene shows us that men think they can go toe to toe with Steve but they simply can’t.
And then this scene is a rare beast. It’s an action scene that is actually a character building scene. We saw the WS blow up Fury’s car and shoot him, but that could have been any common soldier. Sam could have deployed the mine. Natasha could have taken the shot a Fury. None of them could survive in no holding back fight with Steve.
Within seconds, Bucky has Steve off of him (usually if Steve is close enough to hit you, it’s game over for you), then disarms him and uses his weapon against him. Bucky dictates the speed and the path of the fight, and while Steve tries to attack, most of the time he is dodging. This tells us the audience, several things: a. Steve is in actual danger, b. Steve, judging by his face, is scared (remember what beatings he has taken up unitl now) and therefore c. for the first time in 3 movies, Steven Grant Rogers, Captain America, is not safe. The stakes are real. You are feeling the adrenaline Steve is feeling, even if you are not sure why. That’s what makes this scene a masterpiece.