Can't take it anymore, I hope life had a quit button

Can't take it anymore, I hope life had a quit button I just can't, I have had a severe stutter, from 12-13. It's more psychological, and it's like a block. I repeat my comfort sentences like "I mean" tons of times sometimes back to back. Went to lots of speech therapist, I regularly practice for half an hour a day(not enough) but still see no improvement. My parents demotivate me everyday, I can't talk to friends in school properly, I skip school in fear of Viva or oral tests. I sit like a quiet kid from teachers, and other common problems we stutterers feel. I did lots of counselling too but to no avail. My father is a narcissistic hypocrite upon that. I wish God had made me uglier, less rich, bad genetics, even cancer, but not this stutter. It's deadlier than cancer patients. I know a lot of you will give supportive comments, but only people on my shoes can experience what I feel. I even have a very supportive girlfriend, who never minds my stutter. She's like the only person I love and my dog. If it wasn't for them, I would have attempted suicide long back. I wish I wasn't so coward to even suicide.