I like how Sangram is quiet most of the time, avoids arguments, and is generally a nice guy. I would prefer hos quietness to arguments any day. The problem I feel with Sangram is that he is very sensitive. That day Gauhar said "show your sportsman spirit" and he took it as an insult to his career. Aijaz was just being funny today as Haseena and only Sangram took it personally. He clearly lost the challenge with Elli but was unwilling to accept his defeat easily as it was maybe affecting his ego. I've seen him take offence at other similar minor issues as well.
I think he feels that no one should criticise him or even think about it. The good part is, he doesn't start arguments even when he feels offended.
Being quite is also non-entertaining to viewers, so we'll have to wait and see what's his fate in tmwz elimination.
But your analysis is quite fair i would say. Sangram is a little too sensitive.