The adjective disputatious means someone who likes to argue and disagree a lot.

Synonyms are argumentative, controversial, dissentious, or quarrelsome.

The word origins in 1650s. It comes from disputation meaning “debate, argue” plus -ous.

Employees were relieved after their disputatious leader resigned.

The author uses a disputatious style in her articles.

As much as possible, they avoid the disputatious argument in their show.