ouch...
just cause i dont use renders doesnt mean i'm not better than you at the logistics of art.
if you were better than me, then you wouldnt have made those mistakes in the first place, those things i mentioned are pretty simple stuff that you should recognize: things with more contrast are going to catch your eye. the girl with the purple is bland and the colors clash. add that to the fact that the black shtuffs is sharper than the girl just makes it noticeably wrong...