Boy George is ripping Dorit Kemsley for taking a shot at her estranged husband on Father's Day ... calling her post "absolutely disgusting." The Culture Club singer criticized the 'Real Housewives of Beverly Hills' star after she shared a Father's Day message about fathers who fail to support the mothers of their children ... this amid her ongoing divorce from PK Kemsley . Dorit reposted a video Sunday calling men who leave moms overwhelmed and carrying the burden alone a "complete failure."