-——So this is someone with decent weapons and combat training——
Perhaps not. He didn’t learn that dancing while shooting makes for poor marksmanship
As to being shot and continuing to fight, ask any Mid-east vet who fought Islamists as to how many rounds it took to take down one fighter. Light rounds (9mm, 5.56, etc) are notorious for not having stopping power.
I have a 9 mm but use rounds designed to stop, not go through, for self-defense. A .357 and larger has far more stopping power. My AR is not a 5.56 even though the ammo’s cheaper because of the same thing.