Well, the corners of the belt are cut too large. But your belt is a bit too long too, which works in your favour for fixing the corners. If you cut the belt down to align with the ends of the button covers (although those are a little close to the belt boxes), you can make new corners you can cut smaller. You probably need to move the drop boxes inwards accordingly to keep the same relative position.
The ends of the knee plate should not taper but stop vertically.
The knee belt is a bit short on each side, and the radius of the bottom corner could be slightly bigger, as well as the attaching rivet painted white. The snaps for attaching the holster to the belt is wrong. But you can easily fix that by using pop rivets to hold 1 half of the same kind of snap to the inside of the belt. Just use the snap as if it was a washer.
And it's a little hard to tell what hand guards you have, but if they are of the flexible kind I would say you should glue them down on the gloves a bit better around the edges.
It's all pretty easy fixes and you should be able to do them in one evening if you want to.