Help i dont want to cause problems at work..?

kay my supervisor is picking on me non stop even my co workers agree..but i dont want to be a problem at work and tell him off..but I feel like i have to now..is he allowed to tell me what room I'm not allowed to go in?we have a 2 different companys and when a customer orders a chicken we haveto go in the other room and grab it..well he told me not allowed in thier or I can home..but my other co workers had to get 5 chicken orders one time this is rediculous..dont you think?Then he blew up on me when i made a mistake cause i gave a customer a wrong sandwhich and this one needed bacon..and he yeelled at me even when i offered to pay for it out of my own pocket and customers heard it..hes done this more than once and I'm tired of his behavior with me he treats me different than all the other co workers and its not fair..Its like every shift i haveto be so happy with him like praise him..so we will be on good terms help me plz!thanks..