Two things have happened in this thread which I think aren’t being taken into account by your assessment.
First - no one is arguing that Honey and the OP should go sans trainer. Literally no one. My only hope was that said trainer was willing to work with the mare and not discount her based on behaviors which were LIKELY acceptable in Honey’s previous life.
Secondly - there was considerable thread drift. As many of us started to have fun talking about our saddlebreds, long after the OPs update which was delightful - folks came in and started to tear down what we were saying. You came in just after that. We were not even talking about the OP or her horse at that point but instead some general differences in both the breed and what is considered acceptable in sporthorse land and saddleseat land. Like standing in cross ties - many saddlebreds only stand on a single tie or in cross ties in the stall. That’s what they are used to - so like a TB, they have to learn and sometimes that takes a bit.
Third - I am not of the opinion that one should switch horses until it is fun. Because while yes, getting a suitable horse is important, it takes about a year or two for most riders and their horses to really gel, and I haven’t met many who didn’t have some angst if not considerable angst their first year. That is not just in saddlebred land, I’ve seen the same pattern in hunterland and dressageland (not to mention barrel racing land where they trade up horses like they change shoes).
Fourth - I’ve already mentioned the difficulty in finding quiet horses on a budget. You have three choices, buy it, train it, or pay someone else to do so. Either way, the cost is about the same (except for the train it yourself which actually has a higher up front cost since you have to learn well enough to do so). It does depend on your area of course, the OP is somewhat close to me. She already bought the horse, and has picked option 3. That’s great!
And finally - the OP and her horse are having great luck with her trainer and her update is spectacular. The behavior has ceased and a lot of what she has mentioned is so typical for saddleseat land that while yes, it needs to be eradicated, is not cause for immediately throwing the whole horse away. It is just helping Honey adjust to a new way of being and new expectations. What those of us who are experienced with this particular transition were hoping to achieve initially was give the OP some hope that with her trainer’s help, she could end up with a very nice horse. And from what I’ve seen from the videos, she will make a lovely dressage horse.