I think the mistake you are doing is that the trees get more complex in its colouring the farther away it gets, the trees in the foreground seems to have a very rudimentary shading whereas the trees farther away look pretty complex. It should be the other way around, because you obviously see more detail the closer you are.
Personally I like the palette,I think what you feel comes from that the background have more detail whereas the foreground doesn't have a lot of detail. It messes up the way you look at it and you start to look at it as if the farther away you are the closer it really is,which twists the brain.