After many failures, freak-outs and much angry shouting I have finally completed the "Good luck" (what a great name for the mission, for all the wrong reasons). It didn't bring me happiness or satisfaction, but it did give me some relative peace.
Congratulations, but yes the game ends with a bit of an anti-climax.
Thank you, kind sir. I also didn't actually kill the Lucifer, it was my allied ships that destroyed the damned fifth inexplicably fortified against Harbringer bombs reactor after I died. However the Lucifer died before the game over screen came up and the game proceeded to the final cutscene. So that means I died a hero's death.
Overall Freespace 1 is definetly great and I'll continue on the expansion and the sequel. My only gripe with the game is that sometimes I feel like I get shot and killed from nowhere. I'd like a button for targeting the last ship that shot me as an option if that isn't already.