Hope you read the parts before, I was hoping this would not only be a guide for people who have/will or in future will have teams, but also as a some sort of remedy for all of the people who were hurt, damaged, by having a a poor Boss. I know how such an experience can influence self-esteem. What if it was not You but a toxic boss, or maybe the whole organization was toxic?
Hope this is useful.

They don’t care about their employees.
Can you imagine that in modern companies more than 50% of all the people who leave their jobs do so because of their relationship with their boss? And I personally know a department in a very big pharmaceutical company where this is 100% (sic!). Really, we are talking about rotation on 120% annually in a team of specialists!
Not many companies are Smart enough to make certain their managers know how to balance being professional with being human. And even less of them understand that a "BOSS" needs to have high interpersonal skills, be empathic and supportive, not just good at building presentation in power point and filling out reports in excel (or other sheets).
These are the bosses who would, no wait a minute, who WILL celebrate an employee’s success no matter professional or private, empathize and support those who are going through hard times, and challenge people, even when it might hurt. Leaders who you can laugh with and for who you would go that extra mile.
Simply, people who can build and sustain relationship.
For me, it is a situation when you get the task that you don't like, and you don't feel it as an order.
Bosses who fail to really care will always have high turnover rates. It’s simply impossible to work for someone 40 hours + a week when they aren’t personally involved and don’t care about anything other than your production yield.
9 manager sins - why do they leave? - part 1/9