Focusing on the parts

When you launch a product, every feature you add is key to achieving your larger vision. You add new modules to strengthen the initial MVP and those additions stick. Your users are happy.

Then you decide to add a feature that wasn't on the roadmap and treat it like before and push the code to production.  And then you add more and more until you have a long navigational menu with single-purpose pages and multiple overlays.  In short, it is a mess, and totally by accident.