Why

Why
... people like them exist?
They claim that they are open-minded but their open-mindedness is crude,
... people like her exist?
She claims to not be the fire-starter but she is in fact the reason why people get angry.
... people like him exist?
He claims to be loyal and honest when he is nothing but a two-timer and a liar.

Why
... people like them exist?
When they are in front of you, they praise you but do otherwise behind you.
... people like her exist?
When all she does is dig secrets out of you to create a gossip and slander.
... people like him exist?
When people talk politely and negotiate properly, he shouts at you.

Why
... people like them exist?
They enjoy tormenting the lives of others.
... people like her exist?
She enjoys asking for pity from others to gain attention.
... people like him exist?
He enjoys seeing someone fall hard for him only to tell her that she is only in his fantasies.

Why
... people like them exist?
They tend to not know their flaws but they see the flaws of others.
... people like her exist?
She tends to go out with guys only for their property not for their love.
... people like him exist?
He tends to talk big about himself when he doesn't know who is backing who up.

Why
... people like them exist?
They look like angels and be good to you when they are actually not honest with you.
... people like her exist?
She looks like she is helping you with a problem but all she does is add more to your problems.
... people like him exist?
He looks like the tough cat in town but in fact he is but a mouse.

Why
... people like them exist?
They expect you to take care of their feelings when they had never taken care of yours.
... people like her exist?
She expects him to be loyal to her when she is being two-timing her other significant other.
... people like him exist?
He expects you to listen to his preaches when he does not listen to your advice.

The reality of life.