Rudra observed the dark faction player's attacks and understood that these people trying to work together to take him down was actually slowing everyone of them down , as it was more detrimental than if one guy fought with him one on one and the rest only supported him from the sidelines.
However now that they were not fighting Rudra one on one , everyone attacking had to also watch and make way for their team members to attack Rudra. This disrupted their own flow of attacks as being in a team not really in sync broke the momentum and flow of their attacks.
If they had been a cohesive unit , fighting together all the time , like Rudra , Karna and Neatwit such problems would not arise , but this sudden make-do team had no co-ordination in their attacks , as this gave Rudra the opportunity to push back.