@Midgey
No, you dont sound trollish at all. I just got to 60 valor, so I have about half champ gear and the rest cent gear. I don't feel useless, but good teams will single you out for an easy kill and it does get frustrating when I am using all I got and I can't crack this Merc in Rakata/BM gear. I do use shatter shot.
I have experimented with the skill tree a lot and for me it is hard to beat MM in PVP. I had no luck at all with the Danitah Eng/Leath build on my server. The dots are dispelled by the time I get to the cull, so I am left with cluster bombs and a lot less energy after the cull. I watched videos of people playing this build and they are playing in groups with other really good players, so they have lots of support. My guild has left the game mostly, so I have to queue solo most of the time, then it is hit or miss (I know I need to find another... thats a whole different issue ;-)).
I don't feel useless, just there are times when it is incredibly frustrating. Thanks for the input and tips and keeping it constructive.