Damn ngl never heard of a stutter being caused due to someone being shouted at, but may be possible though, especially from a young where we’re learning to speak properly and stuff idk. However I have a stutter too and I’m sorry for what he’s said about it being embarrassing and telling you to fix it, (just reading that upset me) really inconsiderate of him, if there’s anything to be angry with him about it’s definitely that lmao.