I would have court martialed every one of those marines had they been in my command, and I would have imprisoned the skipper of the landing craft for criminal incompetence.
Every single one of those men would have been slaughtered on the beach had this landing been for real. In real combat, soldiers react exactly the way they've been trained. However, soldiers are not often called upon to use "floundering" skills during combat, thus rendering all of them a drag on unit effectiveness. That costs lives.
Yes, this video is old, but to this day, there are 7 combat boots still in the muck on that beach - boots that could have helped us be victorious in Iraq - but no. They had to pick a clam bed to land on.