Yep. Part of the problem is that D&D combat lacks a clear emergency state, short of being knocked out of the fight. Sure, you can see how many hit points you have left, but as long as you have any you can keep fighting at full strength, which makes it easy to convince yourself to stick it out “just one more round.” Especially when your allies are all also fighting at full capacity. The game just lacks a clear signal that it’s time to shift gears from offense to defense, until it’s too late to do anything to defend yourself.