self-opinionated       
adjective  disapproving uk/ˌself.əˈpɪn.jə.neɪ.tɪd/ us/ˌself.əˈpɪn.jə.neɪ.t̬ɪd/
 刚愎自用的;固执己见的
having and expressing very strong feelings and beliefs, and believing that your own ideas are the only correct ones
 See also: opinionated