Perhaps one of the causes, but in times past I've definitely started to get burned out on projects I did not resent- that were simply truckloads of work, with limited time for sleep/food/unwinding.
On the bright side, that was much easier to recover from than the soul-crushing burnout I associate with resentment.
On the bright side, that was much easier to recover from than the soul-crushing burnout I associate with resentment.