antediluvian politician

コロナの問題で開催さえも危ぶまれる東京オリンピックですが、その上にJOCの会長問題も発生しました。The Japan Times Feb.12　の記事から引用します。
Olympic chief Mori’s exit has been long overdue
The country has been embarrassed again by an antediluvian politician, with media at home and abroad condemning Mori’s remarks and the mindset it represents.
"antediluvian" は森さんを形容するのにピッタリなのが辞書の説明で良く分かります。
・Oxford English Dictionary: Ridiculously old-fashioned.: they maintain antediluvian sex-role stereotypes

・Collins Dictionary: Antediluvian things are old or old-fashioned.: ...antediluvian attitudes to women.

・Cambridge English Dictionary: extremely old-fashioned: My mother has some hopelessly antediluvian ideas about the role of women.