"yeah, we want bundled products in our store, but we don't want to fill them in like such. Instead, you have to look at the product attributes, their values added in which sub sub sub category they're stored to automagically make such combinations. Also: of these combinations (that have no actual entity in the database) we want to be able to save images, descriptions, related products, etc."

I managed to fix it, but more than 50% of the time spent on this project was to explain to the customer why their combination wasn't working (they misconfigured the products), and writing a whole testing interface that showed the inner working of the algorithm, so they could debug their own products...

The worst part: we advised from day 1 not to take this road, but they had one "developer" who insisted on this approach because it would "prevent pollution in the database". in the end, we had to add 50-100 product attributes/values just to get the damn thing to work.