It's a different world out there
I don't think it's exclusively an Zimbabwe thing rather than. An African thing... That said South African Airways was always pretty decent to deal with, as was Kenyan, but Ghana had their moments and Das Air Cargo used to be a bit sketchy. Z
However, Zim was up there with MedView (a now banned Nigerian outfit... Sketchy as you'd expect, and even though Virgin Nigeria (basically a Virgin Atlantic A340 with Virgin flight deck and Upper Class crew with Nigerian crew for the rabble and green instead of red) tried to put a brave face on it, they didn't last long either,
You can tell how dodgy a place is by the fact that all the Airport operations are daytime only, even if it means leaving at 11pm...for example Port Harcourt is reputed not to have any runway lights because they keep being stolen, so can't reliably operate after dark. Any country whose airlines are banned from the US or Europe is another pretty strong indicator.