My dear friend Hive account@sillentkiller You forgot to mention about the main negative character from Ramayan - 'Manthara'.She was the one who made kekai do all this shit.Before her entry in ramayan Ayodhya was a prosperous empire.Yes Dashrath killed shravan but it was a mistake and he paid for that in the end but Manthara was wicked(had a hump on her back and was ugly) and was jealous of the love and bonding between the mother's and the 4 brothers.she wanted to disrupt their happiness.For me the main villain is Manthara. She influenced kekai to go against the decision of Dashrath to make Ram the next king and twisted the plot from happiness to grief.Rest characters you mentioned were forced followers of circumstances created by chhal,kapat and pratishodh.

The Telugu version Sri Ranganatha Ramayanam mentioned a small story involving young Rama and Manthara in Balakanda. When Rama was playing with a ball and a stick, suddenly Manthara threw the ball far away from Rama. In anger, Rama struck her on the knee with the stick and her knee was broken. This message was conveyed to king Dasharatha by Kaikeyi. The king decides to send Rama and his other sons to school. This incident makes the king think about his responsibility of educating his sons, so that they can learn and become wise. Manthara had developed a kind of antagonism towards Rama and was waiting for an opportunity to take revenge against him. It is also said that during Rama's childhood Kaikeyi loved Rama more than Bharata and spend more time with him. This made Manthara jealous of Rama.

I hope this explains the whole plot in a better way and help us to find the main villain.

ईर्ष्‍या में मुख्‍य रूप से एक अपूर्णता का भाव छिपा होता है। यदि आप आनंद के भाव से पूरी तरह भरे हों, तो आपके भीतर किसी के भी प्रति ईर्ष्‍या का भाव नहीं होगा।