As you suspect… it’s time for you to move on. You are young, there will be many other possible futures for you, and many other people who come into your life in the equine industry- life is full of possibilities. You will learn things from each of them, and form your own opinions and skills, taking what you can from each. Your current situation is only your FIRST situation. You have learned much already, both about horses and riding, AND about people.
I don’t know how far you will get in the equine industry, you are right, it takes money to be successful, lots of it. Either family money, or money that you pay for in other ways. Don’t “prostitute” yourself. Like many of us, those super expensive horses may not be available for you to own… which is OK, because you will have the skill to make your own competitive horse from scratch, as most of us who are not the offspring of millionaires and billionaires do, and do successfully.
Enjoy the ride.