Just embrace that you will never be able to invent a plot that no one else has ever done before, and look more closely at how other writers use those plots as free real estate to tell the story they wanted to tell

think about how to combine several different plots in different arrangements to make up some novelty, but yeah you're not going to figure out a whole new source of conflict that's never been done before

I know it seems counter-intuitive, but the vast majority of the time, the structural plot is the part that should be almost boring and expected so the audience can use it as a touchstone so they know where they are in the story. It's the other elements that should be delightful

For example, I come to a new land in this game and I'm told "we need to figure out how to stop the horrific rulers of this land who are hedonists who consume the poor" - you have an expectation of where that plot goes, and it goes exactly where you expect. You beat up the king.

So you already know what's going to happen. The "delightful" parts are the things that give you any real sense that the heroes actually won't be successful. Slowly unfurling mysteries, character choices (will Alphinauld verbally confront the all-powerful king? we have no backup!)

the actual difficulty it is to even enter the Grand City, the new small elements of horror you come across, the feeling of helplessness and outrage when powerful evil people abuse their power and you can't stop them, all of those things are the "delightful" parts

I say "the vast majority of the time" because you should, especially at the climax of the story, introduce an unexpected twist or mystery reveal in the main plot, but these twists should be easy to absorb, and things that people have seen in stories before, set up thoroughly.

I learn/remember things best if I have to try to explain them, so sorry for all these half-baked explanation attempts. Writing is fascinating and mysterious to me, and one of the biggest mysteries is why exactly audiences don't mind experiencing the same plot multiple times