You and I are quite similar. I too stutter and have an older brother who can be insensitive about my speech sometimes. It was worse when we were younger (kids and siblings tease each other), but as we grew up together he came to understand my situation more. Not that he fully understands, nor do I think he ever will, but it’s enough. The point is that your brother (from what you have stated) seems to be pretty stubborn about his opinions surrounding your stuttering. Mine was, and still is, the same way. You can’t change his attitude about it, it has to come from him. He also seems pretty immature for excusing his behavior because you are too “sensitive”. Again, spitting image of my own brother. However, as cliche as it might be, I’m sure you guys love and want the best for each other. Remember that. As you guys get older, I’m sure he will wise up and regret the things he has said to you (although he probably won’t admit it). Maybe from his perspective he truly thinks there are simple ways (which there are not) to fix your stutter, which frustrates him. Nothing can be done about this. Not sure if any of this is any consolation, but I do understand how it feels as if my own brother doesn’t have my back. However, that doesn’t make it true. I love my brother and I know he loves me. We’ve been through a lot together, hopefully time will make that apparent for you and your brother as well. Sorry if I rambled too much, I’m not quite sure what I wanted to say, and I’m not sure if I said everything I wanted to, but your post really resonated with me. If anything, just know that I truly hear you and you aren’t alone. Stay strong, things don’t have to be so bad. Find happiness where you can. Have a wonderful day and message me if you want to talk.