The worst person on the show was Kyle himself. On the few episodes I watched he set himself up as sole arbiter of right and wrong, happy to talk over people to stop them speaking, and acting like a hard man because he had his security guards on hand. Put simply he was a bully and very happy to manipulate real people's lives - sure they're at the bottom of the social ladder but they're still people. Worst of all is that lie detectors have been discredited for decades by this point yet it was treated as though it was a legitimate method to determine if someone was telling the truth.
It is not surprising that someone took their own life after "failing" a lie detector test but that it took until now for it to happen.