noun
diatribe
DYE-uh-trybe/ˈdaɪətraɪb/
A bitter, forceful speech or piece of writing attacking someone or something.
The speaker directs a bitter diatribe at the silent panelist.

Etymology
“Wearing away” originally meant spending time, then study or discourse. The word passed from extended discussion and critical dissertation to its present sense of a bitter verbal attack.
In context
how can I start any video without a diatribe um again my target is the self-styled experts online with and without academic degrees most of them misuse the term failed narcissist
More examples
- She had no patience for his bitter diatribe.
- The article was a diatribe rather than a balanced review.
- He launched into a lengthy diatribe about the company.
Forms
diatribe · diatribes