i agree that u wanted to try out a new ,ur own creatve design…but u have to keep in mind whne ever u r creating anything new that the world has not seen before u have to make it believable to them!
i think y pl dont like ur design is because they dont belive it could really fuunction on the road!
try finding out more abt car engines and make rough sketches of ur model over those engine prototypes…i.e. make ur engines fit right nto ur design!
to be hones with right now ur car in a nutshell is a box with four wheels,and shine cool black paint!
u have to actually sketch on a paper or atleast think how ur steering wheel is connected to the tires how the wires connect each part of the car! ,ground clearance ( in which part of the world wld this car be most perfect ,to drive in deserts,snow countries like swiss,or is it a buisness class etc etc.
i wld suggest search on google some car engines and blueprints of them ,front ,side and back
and then try drawing over them ur design that way it will be more believable!
dont lose heart in the cg industry directors r really harsh and nothing compared to coments u have on cg talk!
keep working hard and follow ur dream!