So sorry that you're going through this. I can understand the thought that you're doing well on the surface so people think your should feel great! It's sad that a T can't see beyond this surface, because that is their job.
It sounds like this T was just not a good fit for you and your needs. Have you found a different therapist, or could you do this? There isn't always a good fit between what we need and what T can offer. I'm fortunate in that my T is not distracted by my surface functioning and is genuinely interested in how things are going underneath the surface.
It's good that your brother is getting the help he needs. That doesn't have to mean that you don't get the help you need, though.