1. The points given by judges. In reality shows if you are going to bring a twist like this, you should lay the advantage and penalty on the table beforehand. If you do that after seeing the team formation, then you are inviting calls of being biased
2. Prompts given to teams. The chef had already told Navneet that he needs to handle the crowd better and his team also could see that. Then why did the chef have to take him and talk to the team to change tactics? Both teams were close to 100 as per the chef and so why help out just one team. And if the chef had helped the other team (doesn't look like it otherwise as we know more footage is given to tips given to losing team to substantiate the result), that would have been shown.
If the winning team had been decided based on the taste of the dishes, there was no need of this crowd based bell ringing drama.