Oh dear @Londonmaine I just want to give you a big hug!
When I was a student nurse I was nursing an elderly (but not ancient) man on the busy ward of male surgical, at quite a large hospital. I certainly hadn't known that gentleman before nursing him on the ward, but when he did unfortunately die, I and another nurse, were told to go and get a cup of tea, and afterwards asked if we would like to help prepare him before he went to the mortuary, or prefer to leave that to someone else. We decided to help prepare him, both out of respect for him - we knew him as a living person, not just a cadaver - and because it helped us cope with the sadness of his dying.
He was my first non family death (I had previously seen my Grandmother just after she had died, but I had never seen anyone die before). I felt that the nurse who told us to take 10 minutes for a cup of tea (it was a very busy ward, we often had to work through breaks), and then gave us the choice of whether to help prepare his body or not, was very understanding and said and did exactly the right things. I went home after that shift still sad for the poor man and his family, but I was also able to allow myself my feelings, and to even feel grateful that I had had a chance to make his last days and hours just that little bit more comfortable.
However your first patient death experience was much worse than mine. It was your first death, you knew the man, and presumably his family, you were given a very important job to do (the CPR) even though you and the other EMTs/paramedics knew that he wouldn't actually be revived - you were doing something for the sake of his loved ones. So I am disappointed that the other more experienced emergency responders could do a kind act for the poor gentleman's family, but they did not check up on you, or give you any advice afterwards.
So my answer to you does not need any hesitation; I believe that you feel something that will transpire into a bloody great empathetic skill, so well done, and thank you so much for doing your best for that gentleman, for caring, and for respecting him. You will not continue to be devastated at every death, or weep buckets, but some will still get to you, maybe even worse than today, an easy example being the death of a child, or a young mother dying when she has young children depending on her.
Every time you have a death, or an overly traumatic case, your colleagues should be there for you, just as I am sure that with experience you will be there for them. At the end of every traumatic case the person in charge should ask if each and everyone of you is ok, and their experience should tell them when a colleague is saying they are ok, but they are not really. But they are human too, and the trauma may be bad enough to stop them from being able to reach out for a while too.
You are right that most deaths will be considered sad, but with experience they just won't have the same affect on any of you, as our human bodies and brains have to help us cope with the things life throws at us, especially if it is during the course of doing our jobs. However, I do hope that you are mistaken in thinking that they just thought of him, or treated him, like a piece of meat, and nearly every patient, alive or dead, should be treated with respect. If your colleagues seemed brusque it doesn't necessarily mean that they don't care. If in 2, 5, 10 years time, you find that you are not being affected at all by any deaths or severe trauma, then maybe that would be the time to consider whether you need to change professions.
Again, thank you for caring @Londonmaine, and I do hope that you decide to continue with your job, or at least give it a chance, as I am sure that you will be a great asset to your profession and patients. But if after whatever amount of time seems right to you, you are still finding things too sad and traumatic, then you must put your own welfare first. 💐💐💐