Admitting is acknowledging something is true even though it cuts against your own views, opinions, or interests. If a disgruntled employee blasts their employer, you wouldn't say the employee is "admitting" that the employer is doing something wrong.
It doesn't sound like this particular MSNBC producer supports what MSNBC is doing. He's basically ripping on his own network, which means he's accusing them of doing something wrong rather than admitting it.
You like MSNBC? Which part? And why?
Please elaborate. What do you like about MSDNC?