how to destroy somebody's life?

[Joe]

basically my friend has backstabbed me to an extreme level regarding finances. I do not want him dead, or even physically hurt. I just want to destroy his life whether that be socially, emotionally or financially. for a briefing; he has no money or job, doesn't use social media, lives at a friends house of whom I do not necessarily want to involve (but will if needed), rarely leaves the house, and knows the situation so he avoids me at all costs, which makes this a very difficult task. I have brainstormed for hours and cant come up with anything. any ideas would be appreciated
thanks

also I live in England if that is of any relevance