patronizing
adjective
(UK also patronising) uk/ˈpætrənaɪzɪŋ/ us/ˈpeɪtrənaɪzɪŋ/treating someone as if they are stupid or not important:
patronizing to sb Of those that had seen the commercial, 26% found it patronizing to women and 17% patronizing to men.
a patronizing attitude/tone