It is sad to lose a calf. When I worked on my uncle's dairy farm, it seems we lost one or two every year. I have yet to lose one now that I have beef breeds. A lot has been done to produce "calving ease" bulls, and it seems to work.
A thunder storm came through and I never finished my post. (Yes, we got some rain!)
It does not sound as if your loss was caused by a calving problem; do you have any idea what started the bleeding? Was the cord torn too early/short?
