This has all been done before (P2P lending) with exactly the same outcome, in the
very recent past (last ten years).
It's hard to have empathy for these people when they've been so obnoxious up until now to anyone trying to help them with learned experience.
Assuming you're not running an outright Ponzi scheme, then when you increase interest rates, you lower your borrower quality by the same amount, meaning your risk increases by at least the same ratio (or more).
By taking 8% interest or more, during a period of historically low interest rates, you were lending to the least reliable borrowers in existence - those borrowers that absolutely everyone lending money at lower rates said no to or, even worse, shady gamblers who can't legitimately draw finance from the traditional financial system without raising alarm bells.
There's no surprise in this outcome to anyone with even a basic understanding of maths and/or economics. It's sad, but utterly predictable.