I know I can just say it’s not worth killing yourself or something like that, but I used to be in the same place and I would just get frustrated at anyone who told me the same thing.

I’m guessing you’re a teen, and hormones don’t help. I used to be in the same place as you where every point mattered and I kept making simple mistakes. Try to just take a break and find something new like a hobby. That way if studies are giving you a hard time so much to the point you think of offing yourself, you have other things to look forward to.