It is not healthy to be around toxic people. Toxic people can be anyone.
Friends, family, coworkers, neighbors, and other members of society are candidates for poisonous interaction or relationship.
Whether they have a routine of playing head-games (gaslighting), manipulation, deceit, narcissism, violence or whatever else may be the case they need to be avoided with no turning back to the situation.
I am one who cannot entertain or tolerate any of the nonsense.