I mean, since I'm not liking the game so much, even if I'm playing on Hard, if I die against a boss, when the game asks me to retry I select Easy and I kill him. No need to suffer on it.
Honestly the only reason to play Zestiria is for its combat and cast of characers (if you like them), everything else is servicable at best and bad at worst.
The combat is a ton of fun IF you get the hang of it, but that requires some work. There's a lot going on and some of it is needlessly overcomplicated, but it's not important to know and use absolutely everything. (Might be different on the higher difficulties, but I got by just fine on a mix of Hard and Moderate).
Experiment with what you have, see what works best, get to know your combos and their elements. Slowly familiarize yourself with all the sytems. Part of the fun and challenge is not to just win a fight, it's to do it stylishly. To get as high a combo counter as possible.
Play as a different character if Sorey grows stale. The crucibles are great at letting you try out/forcing you to use something different. I know I played as Rose for half the game.
If you're content with just button mashing and turning down the difficulty for harder encounters and not having fun doing that... well, there's really no point in playing it at all.
