I don't stutter myself, but I've been interested in it forever. It's one of the biggest medical mysteries. What I do know is, there are plenty of people who are confident despite their stutter, and most importantly, when you're speaking to someone its their responsibility to give you the time and attention, ni mattee how much time you take. So i suggest you dont feel bad on account of the assholes around us. Incidentally, I wonder if it'd be possible for us to talk somehow. I'm saying it for my own training, as someone who still has to learn on how to speak while having a conversation with someone who stutters! Let me know if you have whatsapp or something! Good luck!