Fitting in vs mental health

I'm 28 (M) and I'm sick and tired of being a corporate slave.

For context, I've been working ever since I graduated from secondary school.

I can't be sure, but I suspect I'm showing signs of depression.

I think life is getting pretty boring at this point. I've got no friends. It almost feels like there's nothing I'm looking forward to anymore.

I can't help but always envy others whenever i see people having friends to hangout with, or even a girlfriend. Or just... whatever, enjoying their lives in general.

Then there's me, just living each day like my life revolves around work. What's the point of living if this is all I've been doing? And more so for the rest of my life?

On a side note, I do have something to point out which is related to the question I want to ask everyone that has read this.

I've tried working part time as a food delivery cyclist for a short while back then (just for fun) and I really enjoyed it a lot. More so than slaving my hours at a company.

Part of me is tempted to work as a food delivery cyclist full time. But then there's this stigma (beats me, correct me if I'm wrong) that doing food delivery is a 'failure, or in Chinese they'd say 没前途 (no future)' (because you know, being a corporate slave is such a norm right now in this age and society) and anything else other than that is frowned upon.

So I would like to hear from everyone your thoughts on this.

Would you sacrifice your mental health and try to fit in to the ever-changing society?

Or would you just screw what people think and do what makes you happy?