Hidden interface controls that affect usability

This is one thing that pisses me off about modern computing. This is shit that we mostly already figured out, but people with no context decided that visual design was the most important part of UI design, with no forethought to usage or discoverability.

The golden age of computing is sadly long, long passed.

Not just UI, but performance as well. It is absolutely inexcusable if your app struggles with loading text and images on modern hardware.

It's the computational equivalent of exploding a hydrogen bomb to open a chocolate wrapper.