Being fair to the OP, it may not be a case of him being bad at RO, particularly if indeed he has no issue in private life.
I also really enjoy giving a girl oral and love it when they get excited and cum. After a lot of practice, I am very good at but I am realistic enough to realise that while most of the SPs enjoyed it to a point, it did little for a lot of the escorts I met, and rarely made one of them cum.
That usually wasn't down to a lack of skill necessarily or that the SP didn't enjoy RO per se. The key point is that by the nature of their job, their pussy is getting a lot of action and may become sensitive or not so responsive. Plus you're possibly following punters who have been a bit rough.
Similarly, just because an SP tells guys she enjoys it and/or appears to be enjoying it, or says the punter is good at it, doesn't mean she does and he is.

I barely punt these days so can't give any recommendations, I'm afraid. But there is plenty of info in reviews, so just read through them for your area.
You will find some SPs who genuinely like you giving them RO and actually cum from it, but if it's extremely important to you, then AW may not be the best place to search.