If we ever wanted an example of a person who not to be like, it would be Dushasanna, he is one of the most wicked individuals in the Mahabharata. He is the evil younger brother of Duryodhana and is remembered for dishonourably disrobing Draupadi in the royal court. The Mahabharata through Dushasana teaches us the qualities which we should seek to avoid.
Below, Arjuna lists the qualities of Dushasana and gives us the perfect teaching of a person we should not look to emulate.
Dushasana! Why is it that you are always wedding to adharma (unrighteousness)?
You do nothing but seek to quarrel with people. Always seeking to cheat others, your behavior is nasty and wicked.
One day you will have to pay for vanity, egotism, and constant arrogance. Your words are like thorns, harsh and always offensive.
Why are you so heartless and sinful? Never a good thing to say about other people, you never respect the wise or the elderly.
It seems you are the sum of all vices!