What are the pathetic projects that you have worked on?

Tracking the number of times someone made a purchase and tempting them to buy more using loan products which led to a lot of loans and bad debt. Plenty of these customers ended up with a suicide in a short period of time and others were in a horrendous financial crisis. I feel terrible to build products that have taken people's lives and ruined multiple generations of the family and their close ones. God please forgive me