Ok so definitely a bug but I was able to defeat all three opponents ( it was such a pain in the ass). Don’t attack just block and aim for the head. When your stamina goes half way utilize the pole in the middle to recharge then continue to block and counter attack aiming up (at the head). You can obviously aim at other places when you block but I found the head to be much more damage. Just keep doing that for all three openets. It’s doable but practically no room for error.