I think the psychics who are able to see the spirit world says that some people goes to hell. Because their minds are so corrupted, they believe that they deserve to be in hell and as a result they go these lower planes.
The near death experiences are so peaceful and blissful because people become free from body. Its perfectly normal to have blissful experiences when you go to the home. I rarely have short astral projection experiences and I enter to the void state that I think every people who dies is able to experience more fully. Anita Moorjiani talked about her near death experience and she said that she was feeling other people's feelings and immediately getinggetting detached from these feelings and she also experienced unconditional love. I think what near death and astral projection experiences proves is that the physical dimension is the most dense and slow plane. So the people who does bad deeds are already having their consequences when they re-born in the physical world. For most people the only way to become free from this cycle is to start their spiritual journey/spiritual practice while they are in the physical world.