Certainly, if the loss means you encounter financial hardship, you'd be understandably resentful.

But even when the loss causes little financial hardship, it could put a strain on a relationship.

Imagine you invest $20k in my business and I buy a $5k industrial juicing machine for the office so my staff can have freshly squeezed orange juice. I tell you that employees expect free luxury food these days and it'll make hiring much easier. You have your doubts.

If the business does well and we both make a big profit - we're both happy. You still think the juicer was a bit extravagant - but it all worked out in the end, and maybe I was right that it helped with recruitment.

But if the business fails - you might resent the fact I wasted $5k of your money on a juicer.