I've been around the block in major, Top 10 silicone companies.

The app you talk about was probably developed by some summer intern on a tight schedule and never documented, then someone else took over.

They literally don't give a flying fuck about software. One manager I had once was so clueless, he couldn't understand that the GUI of the C# app I made had no code behind it, and kept asking why clicking the buttons isn't doing anything no matter how many times I tried to explain that a GUI can exist without functionality and it's a separate effort to implement that.

Certain apps we were using internally were based on same Java version from 12 years ago since the person who developed it is now a senior line manager and also the sole maintainer.

Then they brought in some Agile/Scrum consultant to increase efficiency and he implemented 45 minute daily stand-ups with 10 people and half of them remote via phone from another country and then he spent most of the day chasing us around the building asking how soon story X will be done. Then they outsourced the whole thing to Poland.

Working in that industry as a SW developer has been a colossal pain and a huge setback for my career I try to slowly erase from my resume.