Looks like the context was that you will never see a B4B Crit Full Thrust as Bard.
To OP. If others of the same level are doing 1-3x more damage than you, than it must be you and not bards issue. Bard is one of the simplest, most mobile and forgiving DDs. If your damage is that bad as bard, then moving to a more complex class will not do you any good.
Suggestion: Get to 50 on Bard. Get some decent gear. Practice your skills in endgame. Then decide.