I have been an NPC judge, competitor and promoter for nearly 20 years, and I have never assigned eyebrow appearance as a criterion for placing an entrant.
So, no, I do not believe the appearance of your eyebrows hurt your placing. I would not have noticed them if you had not mentioned them.
Furthermore, if I had mentioned your eyebrows as a measuring stick in my plaing of you at our judges meeting, I would probably imperil my standing as a legitimate official among my peers.