King, I dropped out of my PhD (probably shouldn't have, but I don't regret it because the build back is going really well, I moved back from America, was unemployed for a few months).

I know this will sound wildly out of order, but do start working out. It's been crazy how much of my self esteem and idea about myself changed. Like transforming your body will legit give you confidence about other stuff.

Next is try to move into research that's very 'employable', employable likely means that the research holds a huge amount of value to society, internalizing that will prevent you from questioning how meaningful it all is (academia often isn't but by building skills, you derive meaning in a sort of preparatory way)

Lastly get off twitter and stuff. Even HN if you can.

All the best! Keep in mind rooting for strangers is a common human impulse and a bunch of ppl are doing it for you.