I feel as -qwerty- to be honest. You'll have to use good words.
Going to the point, I believe it's not easy to make a carset, especially with MSPaint...at all!!! I tried that when i was starting. I remember i was working on Spa 02 with the new pit entry, so I was working on the sponsors and all that stuff, and i was doing'em with MSPaint. I showed my work to Ricardo Lampert and he told me "you just work on the track layout, and i'll work on the graphics". I felt so frustrated that time. But i said to myself "If i want to be part of these guys, who make great things for the GP3 community, i'll keep on looking for it". I started asking people, looking on the GP3form files and I found my lovely PSP. I started working on RHummerich cars for the 2003 cars as a base, and now i can do them by scratch. And every time i paint, i surprise myself even more. And that's why i have a test driver, so he can tell me how does he feel about my cars, what do I need to change.
When I did the 2003 carset I did those cars feeling that nobody like them. But what a surprise, when i got some e-mails saying that my work was amazing!!!
The only thing I can tell you guys, is to get these criticism on the best possible way. And don't say that you feel good with what you've done, and better being self-critical and at the same time, listening what the others says.