What does a hospital staff do to prevent more pain to the relatives of deceased?

In late 2014 after mom had heart surgey I was told by her cardiologist that she a year to live. In 2015 I fought for hospice but was told she did not qualify. After three falls at the house I finally convinced her primary doctor to place her in nursing home to regain her strenght. In late December she was rushed to nearby hospital with respiratory distress. I was told that I was killing her by enforcing the dnr she had. She slipped into a coma and was on 100% bipap. She came out of the coma on the new year. She was still on bipap but totally bed ridden. Hospice advisor on 1/3/16 said she still did qualify for hospice. The hospital said due to medicare she had to be moved. It was decided she would enter a acute care hospital.
Within days she was weaned off the bipap and was on the road to recovery. The day before she died she was breathing on her own and eating for the first time in weeks. I had gotten off a double shift and had made plans to see her the next morning.
I received a phone call at 0024 that she was passing. I raced to the hospital. What should have taken 25 drive I got dressed and made it in 11 minutes. Thinking back I sped, ran lights and place not only my own safety but anyone on the road.
When I got to hospital I was told I could not enter. She was being cleaned up. I thought perhaps she had a dirty diaper. I waited in hall. After the nurse left her room with soiled linien. Another nurse ask me what final arrangements were. It was then I was told she was dead. I explain what she wanted and was told I could go in the room.
I spend some time in the room wishing I had been there for her. She was scared to die alone and her fears came true. Two of the nurses said they prayed with her. My mom was atheist and anti socially. Her last breaths must have been a nightmare for her.
After about an hour in the room the mortuary people came in. I was told to wait in the hall. I was in hall for the longest time and return to her room to get my purse. The last images I have is seeing the body bag being zipped over her head. It is an image that is burned in mind forever.

A few weeks later I got her death certificate and saw her time of death was at 0000. I was called at 0024. When I ask the hospital they said she did due at 0000 but it is their policy to notify relatives after their death and say they are passing. Do not hospitals understand that we might want to be there for our love ones? My mom was in the telemetry unit and I feel I should have told the moment she was in distress and not 24 minutes after she died that she was passing. Why was her faith not honored? She was bed ridden and dying with strangers.
I firmly beleive that someone should have been train to handle death and relatives be placed in an area where they did not see their love ones in body bags. Ironically there was chapel cafeteria and a nurses break room in same hall. I left the hospital alone and it gave me feeling they only saw her as a paycheck. The death certificate had another error it list tobacco was not the cause of death. Lol she died from respiratory distress. She had copd due to smoking.