What to do when your boss want commitment but no accountability?

I have been working as a Front Desk Manager at this Hotel chain (a small hotel) for about six months (I have been through two General Managers). My current boss wants commitment but does not want accountability. So where does that live me as a Front Desk Manager? My boss says teamwork but does not want to work a shift to give a break. I am ask, Is the perfect schedule, so when I ask to alternate the schedule, my boss question why. My boss is a friend with one of the agents, so when I come to my boss about a write up to correct the problem, my boss response, "I think it is personal".
So now ever agent is doing what they want do, I still try to instill something I expect to some agents but it is inconsistent. I have to keep repeating myself; no one is on the same page. I know part my responsibility is to cover shifts when a teammate request off, sick etc. but when my boss say you just have to do it because I am not working the shift. I basically live at the hotel. I am bless that I have job but not able to serve my reason for being a Front Desk Manager, not being appreciated and no one is looking out for me. It is becoming draining and exhausting; even though I try to keep my positive attitude going.
I have actively put myself back on the job market, the hotel corporate seeking the Account Department. I appreciate your feedback.