BAM knew TCS's intention of joining other club by quitting the national team and that is why they ban him for 2 years from international tournament. If TCS's really wanted to quit because of personal reason, family problems, want to study etc, i think BAM is willing to let him go for his own good.
Like Rajes pointed, 2 school of thoughts. Practically, BAM did the right thing in banning him for 2 years because TCS have every intention to compete in international tournaments after leaving the national team. In addition to that he was not honest with his reasons given to BAM cited personal problems but the real intention is to play for other clubs. For BAM, if you want to quit means you really want to leave the sport unless you are no longer performing or maturing under BAM's wing. The action is also meant to set an example to other existing players who is thinking to jump ship.
On the other hand, BAM should examine why players want to jump ship.
As Rajes mentioned " Is BAM the best place for all players – back-up, elite back-up and elite – to be in? Or is BAM giving special attention to only the elite shuttlers?" ..
The key word is here.... BAM is not the best place for all players. - notice the the article by RP did not appear on BAM's website? BAM simply cannot accept criticism.
Why the double standard by allowing some players like Wong Choong Hann, Choong Tan Fook-Lee Wan Wah, Chan Chong Ming-Chew Choon Eng and Tan Bin Shen-Gan Teik Chai to play for clubs and earn a better living but to restrict a young player like CS to do the same? Is it fair? No, it's never fair and player like TCS can never have any choice in that matter. You either stay or quit.
Although TCS have every reason to fight for a better future in his badminton career but he made a mistake by quitting impulsively (handling letter without discussing with the matter deeply with coaches/officials.) There might be solution but the whole thing has been reported in the news media and blown out of propotion so it put BAM in a difficult situation and pressure to take action. He should consult someone who is trustable in BAM as a mediator and honestly tell them his problem. If there is no solution as BAM cannot compromise and solve his problem, the last resort is to quit, pay BAM the compensation money and move on as an independent player. Is that simple but i wonder why he choose such an action that put him in a bad light.
BAM might have the best coaches and facilities in the world but yet they have the lousiest support system (psychological/environment & living) for the players.