The regional politics is completely different in this region comparing the Pakistan - Afghanistan region during Soviet era .
So surely Bangladesh don't want to be used as trump card against the new cold war between China and USA .
Still however Bangladesh could be a solid trump card ,if USA was allied with other country and not with India.
Tbh Bangladesh have no earthly reason to trust India and it's expansionism .
So now if Bangladesh doesn't maintain good relationship with China and take USA side completely, then once when USA will withdraw it's shelter ( as did for Pakistan) ,then Bangladesh will be in huge trouble( by India), because no powerful China will be there to stop India's expansionism.
So although China gave vote against Bangladesh , we assume that it's for her own necessarybenefit.
We have no land border with China and can't help China to get access to bay of Bengal ( like Pakistan can offer them direct root to Arabian sea) , so if China doesn't take Myanmar side ( at least partially) , then if their is a war between USA and china ,China will be in huge trouble.
So in order to get equal play ground against USA and NATO , perhaps China don't want to lose Myanmar , so voted against Bangladesh ,too keep Myanmar happy .So that Myanmar dont join parmanently to western block,and a hostile naval blockade against China ( by USA and NATO) at Malacca straits can't bring China down on it's knees!
So with due respect , I believe we understand the ground reality of this area much better than American civilians , so we are maintaing good relationship with China , because we know that China desperately need direct access to bay of Bengal through Myanmar in order to counter USA and it's NATO ally .
So perhaps you understand now that Bangladesh should be taken very seriously because she knows the regional dirty politics very well and can play accordingly.
Trying to survive isn't bad at all, neither for us , nor for China !
At the end of the day Bangladesh is the country most impacted by the Rohaniya crisis. Where does Bangladesh stand with respect to the Rohaniyas ? the government has to decide one way or other. They have decided they are going to do business with the primary backers of the Myanmar junta. It sums it all. No one including India or USA is going to do your bidding. USA tried diplomacy only to be subject to Chinese veto.
Replace Rohinyas with East Pakistanis and Myanmar with West Pakistan. Switch back to 1971. You were in the same boat.