It is easy to say that you will avoid those I define as Can’t DO Better. However, sometimes this person is a relative or an in-law or fate has locked you together.
There are times you have absolutely no idea of the repulsive traits this person exhibits until it is too late.
You may rent a room in a house and the person who rents the other room is one who Can’t Do Better.
You might marry a fine person who has a whacko sister or brother, aunt or uncle who fills the definition of Can’t Do Better.
You might find yourself in a job where a co-worker exhibits these repulsive traits.
By becoming aware of the ‘category’ of the existence of people like ‘Jade’ and how to deal with them, you give yourself a bit of protection.