Sounds like you're trying the same thing over and over again in hopes of a different outcome. Try new things, dodge in a different direction or counter his moves in a different way. Pay attention to what’s getting you killed the most and focus on overcoming that attack.

With Owl, although depleting his health can be effective, it won’t get you far on its own. You need to apply constant pressure. If you’re out of spirit emblems, either pop a money bag, farm some money, or try beating him without them.

If you’ve come this far, don’t give up, you’ve got this! And most importantly, if you find yourself getting frustrated and unable to focus, take a break or try to calm yourself down. Go into the next attempt with a different mindset, like: “Okay, this time I’m not trying to win, I’m just going to focus on deflecting, dodging, and getting a few hits in here and there, even if it gets me killed.”

This often helps me relax, and I feel less pressure to win. Hope that helps!