Give Life Advice

I have a very important exam in 4 days. I haven't studied anything and Idk how to. I never put any effort in my studies till highschool but i still got like top grades. It's an classic case of wasted potential. This is my 3rd time writing this exam in the Span of a year and to me personally it is not that hard either but to pass it there needs consistent effort and i can't do that. I always want to put in the effort but I can't. When I sit down to study I get distracted even without my phone cause I have tons of hobbies. The first time I wrote the exam i didn't study anything so i wasn't particularly sad about it but the second time i studied the night before the exam like i started 12am almost 10 hrs before the exam, there's four subject and i started studying at midnight for all the exam(that's it no revision or writing notes). The result came out i failed (i had a little hope that i would by some miracle would pass). If I had like 25 more marks i would've passed and i also accidentally prepared for the wrong exam on the third day so i lost a lot of mark there and i made a very big yet rookie mistake on my first paper. The thing is I swore that i would study this time yet months passed but no improvement in my part. I HATE MYSELF SO MUCH. It feels so silly but i don't know what to do. It feels even more silly to ask something academic here but this is the only place where i can say all this. I have tons of friends but none of them know how much I hate myself for my own incompetence.
Those who have went through this sht please help me (i have watched thousands of self help videos)
And i am not sure if anything will help. I feel like such an disappointment.
(Sorry it is so long)

I looked at the cover of C-Class Esper Memorandum and thought oh is it a serial killer guide x esper but then i read it and no its so... cute. why is it so cute. you have the cover that looks like the ML is going to choke the MC.

why are you so cute.

no.

i feel lied to.

i wanted

uweh (￣∇￣")