In case of Aishwarya i think arpit was rude but then nidhi said he dis apologize later for that. If he apologized then there was no need of pointing that again n again.
Sharad being angry on arpit for bringing the fone thing out of nothing is justified. Also when he said i dont like ur behavior with the spot boys, that too was fine. I also dont like it when someone disrespect others just because he is lower in status than him.