Anomie

A state of personal unrest, meaninglessness, and purposeless. Anomie can also refer to the absence of moral values and norms that cause one to feel disconnected from society. Contrast with ennui and acedia.

Reference:

Heydari, A., Davoudi, I., & Teymoori, A. (2011). Revising the assessment of feeling of anomie: Presenting a multidimensional scale. Procedia-Social and Behavioral Sciences, 30, 1086-1090. https://doi.org/10.1016/j.sbspro.2011.10.212