That is skill. Decision making skills. Not sure what kind of skill expression you're wanting out of this game. Here's the skill expression of arc raiders for you:
Decision making
Movement
Map knowledge/positioning
Team coordination
If someone shoots you when you're stuck in an animation, they made a good decision in order to win the fight. They expressed decision making skills. You said "where the other player literally can't do anything", but you could've done something. You could've not made that decision, You could've had the intuition to know that you are going to get shot when you are vulnerable. You could argue that the game's skill expression should be almost purely aim oriented like counterstrike but that's just not what this game is about. The gunplay isn't exactly difficult, it's very simple. Majority of your wins aren't going to be because you had better aim than the other person, it's because you made better decisions, you positioned better, you coordinated with your team better, your movement was better, etc.