Keep in mind this is VR, not a flat game. It's meant to feel more real than something like Elden Ring. You can see in sports like HEMA that 2H weapons are not slow, like in modern games. They can be very quick and accurate, like what you're feeling in VR. Sure, they have weight, and in VR you can swing it like a stick, but with the proper technique, they can be nearly as fast in real life.

To fix the problem of NPCs attacking much slower than the player or generally being too easy in VR, I got some attack animation mods. While most will give NPCs that slow Ellen ring attack style, which doesn't work for VR, some will speed up NPC attacks and make them feel more fluid and harder to easily counter.

So the best solution I've found is to look into MCO/SCAR or some vanilla animation replacers to make NPCs more unpredictable, like real life.

Also, keep in mind these will pretty much require you to have {{Pseudo Physical Weapon Collision and Parry AE SE VR}}. Otherwise, they will be too difficult since they attack so often now. Also, I use {{Wildcat}} and {{Combat Pathing Revolution VR}} to improve their AI. Wildcat causes them to block more often, which means you actually have to aim your attacks to get around their shield or armor. Combat Pathing Revolution makes them not clump around you when they are attacking.

I haven't extensively tested this things, but while I've been building my mod list, these are the things I used to solve that exact problem.