No system is perfect, has every rules and isn't relying on the master to some degree. But then, if you dont like death as being part of the game, why play dnd at all then ?
It would be like not liking horror and picking CoC.
If you want your PC to always survive no matter what, either play a system with it in the rules or make a deal with the DM. But blasting dnd because its not part of the core rules (besides all the ways to bring a PC back from the dead that are already there) isnt fair.