The sources we have access to on medieval life indicate otherwise. There are records of the lives and concerns of ordinary people, contrary to suggestions here.
In particular, the malaise of acedia was well known. It's a word used to name what we now call depression. It encompassed the religious idea of sloth.
The seven deadly sins were names for various malaises experienced by individuals. The means of dealing with them included penance, adhering to strict daily discipline, occasionally pilgrimages.
People dealt with long, dark winter days by gathering together, singing, dancing, storytelling, and drinking. Board games were played, as well as outdoor games, weather permitting, in the fallow season and during times when there wasn't enough work to be done to fill the day, on Holy Days, etc. People of the medieval era were overwhelmingly engaged in agriculture, but had much more time to themselves than wage slaves of the modern era, just because the rhythms of agriculture determined the hours worked.