According to me before Vansh can take revenge on anybody he needs to train Riddhima to become Mrs VRS so that no one can trap or use her or manipulating her in any given scenario. He needs to know that she will always have his back and trust him and not doubt him in a situation.
People are saying that Vansh is using Riddhima against Kabir but I don't feel the same. I think he knows that Kabir sent Riddhima as a spy to VR mansion and because of that all of them are in the current situation. Vansh knows that Kabir betrayed Riddhima. Who knows more about the pain due to betrayal than Vansh. Vansh is not taking revenge from Kabir, he his making sure that Riddhima avenges for her betrayal from Kabir.
People are also saying that Vansh is playing mind games with Riddhima which makes him no better than Kabir. I disagree with this as well. This game is of the mind and to make it strong you need to put it through difficult situations. Riddhima has to learn to keep her cards close to her chest. As she is very expressive all her emotions are there for everyone to see which makes her an easy mark. She has to learn to be vulnerable only infront of people whom she truly trust.
Vansh yes is indirectly punishing Riddhima for her betrayal but he is not breaking her rather making her mentally stronger. He is trying to get her analytical side in the game and make sure that her emotional side takes a back seat.