So to summarize, Kratos can let Hela beat the shit out of him. He'll still come back. He can let her stab him with her strongest weapon (nothing compared to the blade of olympus)...he'll still come back. She can throw the heaviest object on him. He'll still come back. Kratos has literally went through every possible thing and it can't keep him down. There is nothing Hela can throw at him that he can't block. He's waaaaay stronger than her. She barely has any feats. It seems like you haven't played God of War 4 or even looked at the videos because you should know simple things like Kratos being able to destroy a tree with ease if he tried. -_- There are so many feats from the other games that I haven't even discussed but there was really no need to.
Kratos wins.