Is English a rich language with a poor attitude?

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Is it the British weather? Could it be the long shadow cast by the decline of an empire upon which the sun never set? Maybe it’s the collapse of industry and the rise of the self-service me generation of FaceTubers? In any case, the English have a reputation of being a dour lot.
A recently published piece by George Dvorsky at Gizmodo, observes how this is reflected in the English language, which has comparatively few positive words alongside other languages. Note that all examples in Dvorsky’s article are from languages that originated in sunnier climates, but as I look out of my window on to another grey day and it seems pretty gloomy out there, I’m feeling jugaad.