I agree, remove the side cabinets. Then the hood could be a little more of a statement piece.

We need all the cabinets we can get, due to the limited size of the kitchen. Would it help to put the same wood as the hood against the wall on either side of the hood? Thank you.

Maybe think about a different hood design. One that is tied into the cabinets.

In general the hood should be larger than the stove,

here a 36" . And separated by the adjacent cabinets by 3" at least. I believe that is what you noticed as out of proportion. Connecting the hood with the cabinets is a design decision, but probably not recommended in a small space. To add corbels you also will need at least 3-6" on either side of the hood so probably again not recommended in a small space. If you like the curved hood because it matches your house style consider making the 2 cabinets on either side only 12" not 18"

Regarding the full kitchen layout, what are the small walls around the fridge? And the unused space behind the fridge? Was there a question related to the layout? If yes a picture of the actual space will help

The bottom of our hood looks similar to yours. It’s just another look you could consider. I would not add corbels especially in a small space.

The wall to the left of the fridge is connected the to stairs. The wall to the right of the fridge is the wall for the breakfast nook and the space behind the fridge is a powder room by the back door.

Here are some inspiration pictures

I like the idea of a wider hood, with a few inches on each side, but then the cabinets on each side would be very narrow. You could omit the cabinets on each side of the hood and continue the cabinets on the other wall to the hood wall. If you made those cabinets deeper, 15-18", you could eke out a little more storage space. Just make sure the door on the cab against the wall is narrow enough to open fully toward the hood.

This is not what you asked, but is there any chance the door on the right could be moved down to get the range on an L with the sink? You could then do a whole wall of shallow storage--all tall cabinets, or shallow bases with maybe 15-18" deep counter, and tall uppers.

Thank you for thinking outside the box. Moving door and walls is a challenge due to plaster walls and built in cabinets in the dining room.

Hoods that make you use “floss” to clean around them are not examples of good kitchen design.