[xeyownt]

The root cause is likely to the surge of dopamine in the brain related to activities like scrolling social media, fast-paced tik-tok videos, porn, etc. This means that the brain is so much addicted to this dopamine that normal level are no longer enough to be functional.

[Noaidi]

Please see my post above about dopamine and memory. The low dopamine effects memory as well as concentration.

See:

Novelty and Dopaminergic Modulation of Memory Persistence: A Tale of Two Systems

https://pmc.ncbi.nlm.nih.gov/articles/PMC6352318/

[js8]

There can be many causes. Aside from social media, games, porn and AI, it can also be caused by the decline of the living standards or increase of stress in the West due to shift from social-democratic to neoliberal economic policies.