Having no gold kills medal does not make you lousy player. Players who keep dying are... and I don´t like the word lousy, but it certainly makes them liability and is, in my opinion, far more dangerous then if you have low damage output.
Just few tips, on top of my head:
Play with the kit you know well and you feel most comfortable with.
If you feel you are in team that is not strong enough, definitely try to stick with them, unless they are all partying in some ultra stupid place(and they sometimes do). It will make revives much better and easier.
When reviving, try to do it from cover, so you are not exposed. Same goes for hacking devices. Find a position that is most covered from enemy fire. Almost all devices have a spot like that.
Check your back often. Enemies sneak upon players more on gold then on silver. Also, for same reason, try to not stay too long in one place. Or you can also get swarmed.
Dodge a lot. You can dodge your way to safety if you are in tight spot.
Knowing spawn points helps as you can kind of anticipate from where next enemies are likely to come.
Watch out for turrets. They are always at the same places. If you are playing against Cerberus, check those places before you run there. Especially if you hear engineers setting them up.
And good luck! 
(also don´t underestimate swarms, little bastards will strip you of your shields and explode in your face if you leave them hanging around) 