How come minorities are given less choices for who they can be?

thats so true...im not like tha black girls you mostly c on tv n im criticized all tha times n its hurtful but its even more hurtfulwhen ppl who arent minorities or who necessarily go through what i go through say get over it or that it was long ago..yes it was longer ago but now its even worse!!! i cant go a week without seeing or hearing negative things stereotypes n racist comments!