You can read them in his trust page: https://bitcointalk.org/index.php?action=trust;u=1721098

Basically, people think he is untrustworthy because he is “Spreading lies about Wasabi wallet (and CoinJoin) to make their own centralized mixer look superior, causing potential customers being intentionally mislead“;

P.S: The above was taken directly from the neg trust feedback of one of the users.