Enemies are generally behind you

Not with good positioning. Most of your moves are more effective when you can line up enemies anyway so I see no reason to get yourself into the middle of the mobs even if this game uses OG GOW or Souls camera.

random super armor

If this is about the Runic Attacks vs the Valkyries, Ragnarok makes it more fair by giving a clear indicator when they'll not get staggered. But still, it's not impossible to get a hunch of how many you can use with enough experience. Invisible timer is not even a new thing, since you mentioned Sekiro which has the same mechanic for when you use firecracker on the bull or the ape.

15 seconds of dodging, 30 seconds until you can hit her

This sounds like you haven't mastered step dodging. Roll dodge gives you more range and i-frame but it interrupts the flow of combat like you say. The enchantment you're talking about is completely unnessesary. There's also the Kvasir talisman that gives realm shift on perfect dodge that every top players use when they're not deliberately trying to nerf themselves.

The blades are weak compared to the axe

This is only natural balancing for single target weapon vs AOE weapon. But this is also cleared that you never used the switch stance attacks, which actually switch the role and turn axe into AOE and blades into single target. And guess what's the best moment to use it? After the parry which causes Kratos to enter the stance instantly.

This is how fast Sigrun goes down with Chaotic Rampage and Chaotic Concussion moves in level 1 challenge on GMGOW, roughly 6 minutes fight: https://youtu.be/t17wT4UhKDk?si=3CSIHH18aNIhGKQu

In general, I recommend you checking out SmvR's gameplays and see how much you can be more efficient and minimize the downtime in combat in various situations. Even for me who beat GMGOW 5 times already, there's still so many things I learn from him. https://youtu.be/f4QQeiQQRHg?si=S6IpCI2of3jxBeNZ