From what I saw, I think it was a simple human error of judgement - Varun missed a few steps, and suddenly realised that even if he finished the dance, he would loose those cricial points.....and he suddenly gave up. It was like, either he wanted it all or did not want anything at all. He just becaome overwhelmed at loosing the steps .... and instead of being thrown out, he chose to bow out...a spilt second thing, but it happens.
Ultimately the pressure proved too much.
I guess the continuous lack of audience support got to him finally.
I wished it never happened. We lost the opportunity to something spectacular in the finals....we will have to settle for mediocrity ðŸ˜