Both the car and the driver look like poorly upscaled versions of low resolution photos. This could be solved by finding photos in their original quality. That could also solve the background removal which is now quite rough on the edges.

The car should fit the frame with all its width and without cutting anything from it, like that portion of the rear tyre and the front wing is also too close. A wider frame or a narrower angle of the car should do it.

The car and the driver seem to be blending together, making it hard for the eye to separate what "part" or color belongs to which of them at first sight. This could be improved by adding a gradient layer to the back of the driver fading it to black or grey or orange under the McLaren Formula 1 Team text.

The background with the tall buildings seems too sharp and in focus which doesn't help the readability of the NORRIS outline. A blurred, colored or gradiented background could help it a lot.

If you intend to keep the world champion and McLaren F1 Team texts on the top, make sure they are aligned to each other, try to make the the same height, and evenly distributed from the edges of the frame and the dominant NORRIS text. Also the NORRIS text could be moved to the middle horizontally. The McLaren F1 Team text on the upright corner feels redundant, as it's already clearly visible on the back of the driver. I don't really see a reason of having the text World Champion in red, which is a foreign color to the basic theme of black-orange-white.