A messy deck
Whoever put this deck together should have a medal. This amount of misalignment can’t be coincidental. We are certain that it’s a result of a considerable effort. There is no other explanation.
Alright, there is a remote chance that it wasn’t intentional and that it’s simply a result of hiring a terrible carpenter. Maybe a homeowner did it himself while still learning about measures, alignment, esthetics, holding a hammer, nails, screws, and absolutely everything that has anything to do with carpentry.