Is it because he asked Gautam to stop bitching about bedroom group? wats so wrong with it?? maybe he got tired of listening to the same shit again and again. He actually gave him a very nice advice as an friend and well wisher i.e. Gautam needs to shun the negative feeling if he wants to remain cordial with everyone which Gautam did not pay any heed to his advice, instead it hurt his ego.
Also, Praneet did not support Gautam for captaincy because he thought that since Gautam is not cordial with most of the housemates he wont make a good captain. You may disagree with him but thats how he sees it.
There is a difference between a "YES MAN" and a "FRIEND". A true friend will always try to correct you if you are wrong but a yes man will always support you regardless if you're right or wrong. It seems people here wanted Praneet to be Gautam's yes man NOT a friend.