well we have to be hounest and my opinion is i can see you tried hard and put in a lot off effort

its just that so much things have issues
not ment badly hey

i'll try to give some pointers you could use
take the windows > they look soo thin because you did not brush back the moldings / rubber trim it needs way more depth with moldings and on the lower line a strip like all cars have
the refs > i like the way you worked with making refs its just that they are soo strong its like a mirror , on cars in real life sometimes you see extreme refs but on a chop thats the hardest to get right , best is to get refs less mirror like
the basic would be to use dark and lighter area's to create depth in the body and add highlights for instance , you can use reflections of things (mirror like ref's) but never soo strong
the one on the side looks best but the opacvity would have to be way less and then it would look so much better , also refs should not be very sharp
the mesh in the front bumper , you have 2 vents with mesh on all 3 the mesh is in the hole in a different way pattern wise , if all the mesh lines would run the same it would be so much better
also using such a pattern its best to set it to blending mode (ligh for instance) and with the eraser erase aloong the edges (with a soft setting) so it looks like shade from the vent is on the mesh (mesh is inside the vent)
the last few pointers would be proportions and angles / perspective
in a way you made the car very very narrow , long and tall , proportion wise you should kept closer to the original lines / proportions
and perspective wise there are also a good number of issues
take the 2 larger vents in the fb , proportion wise one is way bigger and perspective wise they dont make sense either
all this is not to tell you what you did "wrong" or to flame but because i think you might see what i mean and be able too use this info on your next chop
imo you should do a 50/50 chop 50% c&p and 50% brush , kinda mix the 2 styles and first try more rebrush of parts you first make fit correct to the car and then brush
anyway all in short (above) some things are hard to explain with words only
typing all the expalnations on how you could do some things would take ages
hell this reply is already getting pretty damn long
keep it up and
grts rich