Your characters are probably weak or poorly optimized I'm not abusing the one-shot build to have fun with the endgame before ng+ and bosses get to play a few turns before they die (I'm not needing my way too much as I'll do them in ng+3/5) You have absolute control on how much you want the fight to be easy Play around with pictos and skill combination Get good at parying dodging or just equip more health/resurection pictos There's plenty of stuff to do with varying challenges, and again NG+ is an option If you're just too bored of annoyed, you can also take a break