when your grandpa said "talk slowly, stuttering means you’ve got no personality" that's such a shitty thing to say and i'm sorry about everything you've been thourgh. my dad is really mean to me too and he says stuff like that to me too, and i'm catholic and he says stuff like "what did you do to upset God?" i have been trying to overcome my stutter for a long ass time too (i'm 20) and i'm starting a new speech therapy on september eleventh so i'm pretty hopeful i really hope that things get better for you soon :)