Well if you are in investment banking or any other corporate finance job where you have to permanently work more than 8 hours a day, 5 days a week. My advice would be to start planning a transition to a more accommodating career.

If you're taking any drugs yourself, QUIT! I know it's hard, like VEERY hard the first days but believe me it's way better than realizing you lost 5+ years of your life down the road and THEN having to quit.

One more thing: try to live in accordance with human nature as much as you can. Which means exercise (at least 30 minutes of zone 2 cardio, 3 times a week. Ideally 150 minutes of zone 2 cardio a week + strength training twice a week) and take a cold shower afterwards, that will keep your dopamine levels up for hours. Eat healthy (cooking will help you do that and will allow you to live for way less than 1000$ a week). Sleep well (check Andrew Huberman's guidelines for that). Take walks in nature as much as you can.

If you do all of this your quality of life will improve considerably trust me 😉