I’m thinking of Jet Li’s Hero. It’s totally decent as a movie, but I think it’s almost un-rewatchable. Not because the ending is known, but because of the super long flashback scenes. Many of which focused on long, colourful, extravagant, not really even relevant to the story, scenes.
I think the movie would be much more rewatchable if all that time was spent on
spoiler
the standoff between Jet Li’s character and the king and things like that.
Probably not in the way you mean. There are certainly movies that benefit from watching again, whether to fully understand what is going on - often involved convoluted plots or a twist that adds new context to all the scenes, or because each individual shot/scene has so much going on that you’re always catching some new detail. And I do think those aspects are mostly intentional.