The main thing is congruity. all icons should have the background in common more or less. There needs to be a texture to glue all of them (look at the skill icons, they look great don't they?, why? because they have the same theme)

Right now if you look through the items, its really broken,

I have nothing against the icons independently, but they must be seen as a whole. They are all placed in the shop, they are all placed together in the inventory.

I know you guys understand what i'm saying.

Please, work a little on this, and the Ui will look awesome.

As I said, place a common texture in the background with small nuances for each item. (items with Auras should have a more filled background) - tranquil boots have no reason to be like this