Don't blame yourself, I had this happen last time I did a competition like this for Athena, I'll took that stallion to be her mate also. I'll take a look at him once you get the edit done though and decide then.
I don't see it as one-sided there just weren't people interested in Niabi, kinda a shame to though. She is my favorite mare and the first OC I've made next to Aurora, Kalila, Rahi, and Zamira.