How do you deal with feeling like a failure due to being poor?

So I used to run a successful construction business but last year an accident happened during an assignment & not only did the business go bankrupt but also went into huge debt from all the legal stuff I had to pay off. Sold house, sold cars, sold everything valuable. Now I have a day job which doesn’t pay super well. I have a son and I feel like I’m letting him down, even though he’d never admit it; on the contrary, he always comforts me & tells me he’s happy with what we have. I basically cut off all of my personal expenses to spend the money on him. I feel so bad everyday.