You are wrong about that. 95% of all players tab target the first enemy *****torming through their little team.
Furthermore it's extremely important to pick your targets wisely. You are (unless you are rage and rage sucks imho) no clashbeast. Go for the healers, isolated 1-3 players, ranges, whatever doesn't get you the wholes group attention.
Force Camouflage is a second life every 45 sec in Annihilation btw. (90% at least) It also makes everyone detarget you (VERY useful) Undying rage makes u live at least(!) 5 seconds more.
If you use stims/medpacks and/or have healers it will provide you with another life as well.
Many marauders that are unsatisfied with their class don't pay much attention to their fury bar. Fury abilities are more important than many think.
Berserk in anni for example is an awesome selfheal, predation is a group(!) movement buff which also applies to the ball carrier(!).
Forgot an important question btw:
- What is your spec?