Have you played all the valkyries....??, that last one is REEEEEEEEEALLY TOUGH.
I prefer bosses when they're like the size of Kratos. Happened the same to me in Blooborne, the best battles were against other hunters. When you fight a giant beast it always feel clunky to me.
I always read this, but the last valkyrie was the easiest for me. Just had to remember how I did to avoid the attacks of the previous ones, and I killed her on the first or second try. Of course, it was only in normal difficulty (or hard? don't remember), but anyway, I had a lot more trouble with some other valkyries. The last one was a lot of fun though, can't deny that!