Learn English – Expression for “running/getting out of somewhere really fast”

Crouching is different from "bending down." The picture that you have provided is of someone crouching, with his center of gravity in the same vertical plane as it would be were he standing. A person who is bending down would bend be leaning forward with his center of gravity ahead of where it would be were he standing.

To "duck" might imprecisely mean to crouch very quickly, but it could also mean to bend over very quickly or to fall to the ground quickly.

I suggest 'degrade', e.g.

"Developers very often degrade the software when their intention is to improve it."

"Software decay is a key concern for large, long-lived software projects. Systems degrade over time as design and implementation compromises and exceptions pile up."

An Empirical Study of Design Degradation: How Software Projects Get Worse over Time https://ieeexplore.ieee.org/document/7321186

In fact there is a humorous/sarcastic term commonly used by software developers but I can't remember it! I suggest you ask on a specialist computing site.