There are instances in the Mahabharata where Kauravas have shown their humanitarian qualities
1. Vikarna protesting against the disrobing incident.
2. Yuyutsu joining Pandava camp on day one.
3. Duryodhana was never a king. He was just a prince till his death. He couldn’t be a king till death of his crowned father. It doesn’t seem from the epic that Duryodhana ever tried to grab the crown by assassinating his father.
4. There is no slightest mention in Mahabharata that Duryodhana ever ill-treated his subjects or public in general.
5. Duryodhana actually means someone who is extremely difficult to fight/defeat or wage war agains (Duryodhana = Dur + yodhana = Difficult + fighter). Duryodhana never breaks the rules. He always abides by the rule book. Yudhisthir breaks rules, Arjuna breaks rules, Bheema breaks rules but Duryodhana, NEVER. He killed Abhimanyu by forgery only when Abhimanyu started verbally abusing the Maharathis.
6. Duryodhana strictly adheres to his duties as a Kshatriya and even in his last combat, fights bravely. He chooses to face Bheema in combat over all the other Pandavas, whom he could have easily defeated in war.
Yudhisthir says he can choose anyone to fight with to which Duryodhana says –
I can kill all five of you with my Mace but let me fight Bheema. He alone can stand infront of my mace for some time.
7. Duryodhana was faithful to his only wife – Bhanumathi. He never married a second time.
Duryodhana’s wife Bhanumathi and his close friend Karna were playing a game of dice. The stake between them was substantial. As the game progressed, it was evident that Karna was winning and Bhanumathi was losing. Karna could not suppress his delight. Just then Duryodhana entered his queen’s chamber. Karna had his back to the door while Bhanumathi was facing it. Seeing her husband coming, she was about to stand up. As she was just rising, Karna, thinking that she was trying to get away from the embarrassment of certain defeat in the game, snatched at her drape, studded with pearls.
As both she and Karna look down sheepishly, unable to meet Duryodhana’s eyes, the Kaurava scion only asks:
“Should I just collect the beads, or string them as well?”
This shows Duryodhana’s faith on his wife and trust in his friend.
9. Later the gods asked Duryodhana why he insulted Draupadi and took part in the disrobing incident to which he had replied,
This woman is a public woman. She sleeps with 5 men and is very proud about it. Nowhere do we see such instances of shamelessness. This woman does not deserve to be a queen. And I did not do it when she was the queen. I did it when she was nothing but a slave. I could have killed her but no I just wanted to break her ego. She repeatedly insulted our royalty for no reason and I don’t think I had done anything wrong. For time should know, what happens to a woman who chooses to seek the pleasures of many men all at the same time and repeatedly insults the royalty.