I hear you sister. A Provider should take a gig only if he has the skills and tools for the job.
I respectfully disagree! There is a chemical ingredient called Sildenafil very useful for F*cking!
LOL! Right?!
For some "Tops" viagra is not enough.
Age also plays a factor.
A dose increase to make your cock hard,
could also make your heart stop.
Oh, the dilemma.
I agree with these 2 statements. Write an objective review.
Treat it like the review of a contractor who didn't finish the job you paid for.
The discounted rate shouldn't affect your review. He shouldn't take jobs if he's not in prime conditions.
This is not a cheap service or hobby, and in some way, your time and money were wasted and not fully respected.
I avoid giving negative reviews if the session wasn't incredible but the escort was "functional" and did everything that was promised.
But in this case, you made clear what you wanted.
After the review, some might read a little abuse in both parties but at least he'll have a chance to improve his service.
I will piggyback on @tenderloin advice and say that a less than stellar review is also an opportunity for a win-win situation.
If he's smart and values his reputation, he'll make it up to you with a follow-up session, if not discounted, with some other benefit.
Good luck and if he doesn't respond well don't get discouraged. The ocean is plenty and there's a myriad of good providers out there.