How hard he hits him though. He nearly knocks him off the chair he hits him so hard and Bucky’s head bounces on rebound. And Bucky isn’t even being defiant here, just stuck. He’s caught in his own thinking and isn’t really resisting, just not reacting. He’s still Winter Soldier here, but Winter Soldier trying to figure out what just happened with his day and we know he could stop Pierce mid swing if he really wanted. But he doesn’t, just sort of pulls himself back upright still clinging to the fact that SOMEHOW the Soldier knew him and can’t figure out why. The little bit of Bucky that’s left frantically trying to organize fragments of memory.
Pierce died too quick.
Bucky should have killed Pierce…..it should been slow and awful and Pierce should have felt everything……..wow, I had no idea I was such a vindictive person