Can't remember anything even after hours of studying and continuously failing for every single exam

like I said. I used to study and got good marks during the last semester. But from this sem it's been a downfall so bad that I need 100.5/100 for the next model exam to get eligibility to write my final exam. I find it really hard to retain information, to focus and to not doomscroll. Even in class, I'm constantly on the phone and don't listen. And if I'm not doomscrolling, then I'm sleeping. While my roommate studies the day before and gets more marks than me... some help me. I don't wanna do this year again😭😭