Since human beings are inherently social, our brains naturally and unconsciously mimic the moods of those around us, particularly people we spend a great deal of time with. This process is called neuronal mirroring, and it’s the basis for our ability to feel empathy. The flip side, however, is that it makes complaining a lot like smoking — you don’t have to do it yourself to suffer the ill effects. You need to be cautious about spending time with people who complain about everything. Complainers want people to join their pity party so that they can feel better about themselves. Think of it this way: If a person were smoking, would you sit there all afternoon inhaling the second-hand smoke? You’d distance yourself, and you should do the same with complainers. – How Complaining Rewires Your Brain
This is why you shouldn’t have time for people that complain. Even if it’s family.
If you want to do your best work, stick with people that are positive and trying to head the Amie direction you are.