At the start of Good Omens, there’s a scene where demons are sharing their recent misdeeds. A couple of them are sharing “classic” demon stuff like killing and possessing, but Crowley (the protagonist demon) shares more modern evil deeds, such as creating traffic jams.

https://en.wikipedia.org/wiki/Good_Omens

I’d link to a clip of it, but to your point some devil is making it frustratingly hard to find.

It's been years, but I seem to recall that Crowley specifically is very proud about making sure some motorway project got botched, because the continual drip of suffering from the accumulated jams and road rage makes him look really good in the spreadsheets even though he's not much for the classical showy stuff. Millions of little instances of suffering adding up year on year, instead of a handful of incidents of really intense suffering.