The story
From cringe (verb) + -worthy (suffix meaning of ‘sufficient worth for, deserving of’), popularized by the surname of the character Cuthbert Cringeworthy, an extremely studious pupil introduced in 1972 into The Bash Street Kids, a comic strip by the Scottish cartoonist David Sutherland (1933–2023) published in the British magazine The Beano.
Etymology from Wiktionary, CC BY-SA 4.0.