i work in legacy code over abstraction gives more headaches than having to check manually when you need to change the software and the person who write it isn't

i work in legacy code over abstraction gives more headaches than having to check manually when you need to change the software and the person who write it isn't in the company in the last five years, because the software is full of constrains that you don't known, and when you need to change something basic the whole software collapse(because of the interdependence of the componentes).