"Deep pessimism" refers to a state of extreme negativity or gloominess, where someone has a highly negative outlook on life or a specific situation. Full definition
Ten years ago, the World Economic Outlook forecast good times for ever — now deep pessimism reigns, with a possible Brexit only the most immediate threat (theguardian.com)
- Equity «fundamentals» sentiment is still holding up, and now «technicals» sentiment is starting to rebound from deep pessimism. (topdowncharts.com)
Deep ecology is really deep pessimism: How could beings such as ourselves ever show the discipline required to sustain ourselves? (firstthings.com)