How do people become broken?

Overly sensitive, with a core processor that's too weak.
Every moment, you absorb information from the outside world, such as changes in others' eye contact, subtle tones of voice.
Even the weather, traffic conditions, news, updates from classmates on social media.
And these pieces of information, if not iterated, filtered, or sorted out, will all remain stored in your current application cache.
Because you lack the ability to process them.