Why can't i get rid of my stutter and the fear of talking to people?

Why can't i get rid of my stutter and the fear of talking to people? I have stutter when i was child , it was developmental stuttering and i got over it quickly and didn't payed attention much to it.Then the stutter returned in the first day of my college when i was introducing myself infront of the whole class , it was embarassing no one laughed at me or made fun of me but that made me conscious of my stutter and the way i talk to people. I'm afraid i will stutter if i talk to people so i was never brave or outgoing in my college days. Gradually the stutter took away all my confidence, i searched how to get over my stutter or how to manage it on google ,youtube, reddit and even quora, after reading the advice of people i felt a little bit confident but when it comes to talking to people other than me i can't speak without a stutter and i start panicking. I can't even speak properly to my mother or my brother i just stutter at some words and I can't even convey my message. It is so frustration and feels like my life would have been way better without a stutter. I tried to be brave and didn't care about what people think of my stutter, practiced infront of mirror everyday but nothing seems to work when it comes to it. I'm tired of my life and want to unalive myself at this point. Nothing seems to be working, life is hella hard and I'm concerned about my future. Can anyone give some advice , i don't know what to do with my damn life, it's frustrated asf tbh , I'm really done with this life and my stutter, lack of confidence and everything.