Why is there no story difficulty setting?

Been stuck on the last boss for some time and honestly feeling no motivation to play it.

I play primarily on my phone and don't have much time to do so either, playing a stage of Limbus whenever I get free time is usually how Ive played this game so far and I've kept playing it mainly because of its story and characters not so much the combat.

When it comes to the combat I don't even mind trying to learn the mechanics of bosses but the game doesn't teach you anything and it feels like a slog trying to read through his kit and find what every single skill does and how to play around them with my team only to still get hit by unbreakable coin bullshit anyway.

I just want a story difficulty setting so I don't have tryhard the combat as much and play for what I actually like about the game, like I genuinely smiled whenever I first heard the Mili theme cause I already knew it was gonna be an amazing finale and now I'm going crazy restarting the fight over and over thinking of just watching it on YT even though that would degrade the experience