Same goes for OP. I'm literally his age, don't own property, have less in savings (I don't work in tech), and consider myself both lucky and free. Also lucky not to live in the US, where other people's perceptions of your relative wealth seems much more important for dating / social life etc.
Perspective governs so much of how meaningful and rich our lives seem. I look at my family / contemporaries who have children, or have crushed themselves at a desk for twenty years and feel inestimable gratitude I didn't sacrifice my life on that alter. OP's problem is a long period unemployment and depression, not some kind of nebulous 'failure'. Fortunately it's readily fixable. 43 is not remotely 'past it'.