You shouldn't be too hard on yourself. You learned a lot more than you think based on your OP and responses. You said yourself that "in real life" the dynamics would be different. Your "assailants" have done this a lot and can probably predict almost everything you will do based on the scenarios physical limitations. Kind of a "Captain Kirk" no win. When teaching furtive movement drills I have to "act" out different scenes for students to react to. It's difficult because the students know me and know that I won't harm them. They don't have the dynamic of real fear for their safety and reacting accordingly. In almost every instance they allow me to get too close to them before they react with a self preservation action of some sort. In the case of your training class it seems that you learned that cover is good, movement is good, backing away from your cover would work out well, multiple "street" bad guys would not be as bad as multiple Navy Seals. Instead of "disheartened" think in terms of how you would react differently in real life based on your actions in this scenario based situation. Everyone in your training scenarios knows who everyone else is and, to some extent, what is going to happen. Take the same scenarios and put people into them where everything except who is the good guy and who is the bad guy is unknown then dynamics and the advantages and disadvantages are altered. In my own training I look at scenario based drills as a way to examine and tune my thought and planning processes based on my reactions as opposed to how well or how poorly I think I may have performed the drill. Obviously we participate in these drills to the best of our ability, at the time. The purpose of training is to improve those abilities.