Someone tell me what is wrong with my stepson he is 24 years old we live in a whole house the rent is $800?

the rent is between us all i pay 300 my brother pays 200 my stepson pays 200 and my son pays 100 now tell me why my stepson thinks 200 dollars is alot of money for his part he has 2 big rooms cable internet washer machine dryer and he complains about 200 dollars for all that i told him were else is he gona go and pay that much with all that stuff hes lazy he wants me or my brother to wash his dishes clean after him