Sounds to me like a situation that happened last year in my area.
Nice family is looking into purchasing a horse. Now, this horse is my version of AWESOME. Bombproof, sweet, but still with enough energy to progress up the levels so the kids in the family wouldn’t have to switch horses.
Now, fellow horse person and supposed trainer watches the kids lessons (with another trainer) and deals with the horse a little herself. Tells the mother of the family that this horse is awful, not going to work, and has issues that they have not seen and wouldn’t until they brought him home.
Due to these comments, family decides to look at other horses too, just to be sure.
Fellow horse person and supposed trainer goes out the next day, literally, and tells the owner of the horse that she would like to purchase him because he’s such a great guy.
Luckily, the owner of the horse kind of knew what was up and held him. He is now owned by the family.
In all reality, if your horse was so awful, so horrible, why on earth would she want him? THat just seems like a massive waste of time, money and energy on her part. My guess is that she sees what you see in him, all of that potential, and knows that a few months of training could make him look awesome, and boost her clientele.
She’s a kook. A kook who knows you’ve got a great horse. Ignore her, lock up your stuff, and keep looking for someone to lease. It’ll all work out.