I don't think anyone of them is mental at all you put yourself in their shoes if you were asked to stay in house for three months with only people who are either your friends or bullying you there will be same behaviour from your side as well the problem with this season is there is too much of reaction and gender biased bigg boss is about entertainment and mind games I don't find anything like that in this season at all and mental is very strong word but the context of using it in form in general like how we say our friends pagal h kya it has nothing to do with serious disorder issues and talking about devoleena many time if we don't like person in anger mode we also talk of killing that person and shukla is aggressive if all of them are like fire ofcourse whole house will burn to flames this what happens when you select contestants of same temperament