I have wayward souls, yes it's hard but imo they're harder in their different ways. Wayward souls has a ton of enemies that can chip you down and some pretty bs boss fights.
But death road to Canada is already a decently hard game with the zombies. But what I think makes it so hard is the random events that happen and screw you over completely.

that was a good one too \/
Also to prove my point on how the randomness makes this game hard. I was like 11 driving days away and this happens