We gave up religion(s) and tradition(s) for consumerism, turns out buying shit is not the optimal long term fulfilment panacea. Add absolute lack of body and mind hygiene and you get to feel like a complete waste of life by the time you hit your 40s. By then you realise discipline/work could have put you in a really nice place, socially, physically, professionally, but now it's too late, the damage is done, you can only pick up the crumbs and have to work twice as hard to get anywhere close to what it could have been => mid life crisis.

Buying a porsche gt3 and a nice house with a swimming pool won't make up for wasting 20+ yours of your life behind a desk