the lower your rank is the easier it is for you to be killed, i've always found the game will favour the highier ranked players as its genuinely harder to kill them.

try going on smaller quieter servers with 10/15 players, at least they're spread over the map so you haven't got someone in every corner taking shots at you.

I gave up playing on the huge 60 player servers ages ago, as its just impossible to stay alive with that many people shooting at each other

failing that my offer of protection still stands