I’ll respond as someone in a relationship, but one in which my partner isn’t into the cuckold kink.Let me ask you something and I'd like you to be honest. Do you see yourself as a "catch"? What I mean is, if you were dating vanilla, would you be successful? Do you see yourself as the type of man that women want to date? My point is this, if a man is not very desirable in the vanilla sense, then it stands to reason that this would hold true in the lifestyle sense as well. Just because a man is willing to let her fuck other men does not mean that trumps all the other deficiencies he may have. Please understand, I'm not implying that you are not desirable. I'm just asking how you view yourself.
I’d consider myself a catch against most metrics - pretty good looking, decent body and reasonable cock (bit above average), successful, easily in top 10% of earners in the UK (probably closer to top 3%), great career, own properties etc. Definitely had no issue getting women when I was single (to be fair, that was about 15 years ago).
If I were to be single again, I think I’d be a lot more upfront about what I wanted sexually from the beginning of a physical relationship (I think that kinks have become much more acceptable in the last decade or so, and I’ve also grown in my own confidence) - just because actually it’s a real grind wanting to have a kink fulfilled but not having a partner who’s similar in their desire to experiment.