I feel my peak youth is dead.

I have wasted 3 years of life in reddit, Quora,Yt and etc mindless social media. I failed university exams 3 times, And not have much hope for 4th either. I'm almost 19 and regret of wasting my peak youth which could be invested wisely haunts me day and night. I quit things I love like gaming, programing etc just to prepare for university exams and fuck it. Even tho I'm only 18.7 but my past regrets sucked my whole life happiness and I've no motivation to push further anywhere.

I just wanna go back in past to change everything 💔