@Alx789

Duty Finder can be very nauseous, it might random add a toxic player if unlucky. I've seen many bad players, muted players never speak up if something happened. Trolls and etc.

Everytime I use DF, I will have to chill out and expect the worst scenario. Usually I pop in and say hello follow by a sarcasm saying "I'm a noob at healing!" just to break the ice on the suspicion from other players.

There is no need to blacklist someone, good and bad players exist. Perfect world is a myth!