You're doing exactly what the Shaytaan wants you to do. Your life is only wasted if you die on kufr. You need to find what is causing you to be so depressed and work through it. Letting the issue fester will only make it worse. Stop going on social media, it does nothing but make everything worse. Turn to your Creator, truly turn to Him, with all of your problems and beg Him to help you.
You don't need to go to graduate school if you don't want to, but you should find something beneficial to spend your time on. Try to help people in need and live your life for your Akhira and not the dunya. Nothing anyone achieves here matters unless it is done to seek the pleasure of Allah.
Repent now, and every wrong you did in the past will be converted to good deeds. Force yourself to perform Salah, even if you feel that you currently hate it, just keep doing it. I stopped doing it a long time ago and my life only got worse. I thought poorly of Allah and everything was miserable. Al Hamdullilah, with His help, I was able to change my mindset and realize I was in error and everything bad that happened to me was from my own doing. Think good of Allah, realize He wants what is best for you. Understand that the suffering you go through in this world aren't always punishments, but more like purification or a means for you to come closer to Allah. Once I started doing what I mentioned, my life has become much more bearable. The turning point is when I started to perform Salah consistently. And for the first month, it actually caused me extreme physical pain in my legs, but I suffered through it and now I have no problem. Yea, sometimes I get whispers of "why should I pray" or "its the same thing over and over, why do I keep doing this" but I realize it's just the Shaytaan. You will always have him tell you to do the opposite of what you need to do.
Start watching YouTube Lectures and stop watching Western Filth and stay away from Social Media. The more you view them, the worse your mental state will become.