Everyone in here complains about this but it its never a problem for me. Just use cover and don't stand anywhere for too long.
Sometimes you have no choice to be in the open (spawning right in the middle of a hail of bullets and grenades) and in order to kill the 12 recon douches on the other team you need to expose yourself. Of course, killing a sniper with an assault rifle or CG can be quite hard so what happens is:
Spawn, get killed by sniper. Spawn, repeat. Spawn, try to kill sniper but fail because even a sniper hit to the little toe results in a one-shot-kill on HC. Repeat the entire process a couple of times more but eventually give up because it's no use.
Also, spotting (which hugely helps teamwork) is disabled in HC.
I don't see how anyone can enjoy this. I played HC exclusively for weeks until I tried Normal mode. The difference was huge. I stayed alive for much longer, k/d doubled and I ranked much faster. The game became much more fun to me. By then SiC almost caught up with me in rank, even though he bought the game weeks after I started playing. Now, I'm not a great BC2 player I'll give you that, but I'm not bad either... to me the problems with HC are obvious. Surely you at least notice the OP snipers?