Inaccurate historical portrayal, lack of detail in the environments, unconvincing time-travel effect, unremarkable adaptation of Deadpool's costume, flat lighting, uninspired choice of eras, uninteresting landscapes, inaccurate cultural elements, lack of historical accuracy, dull colors, lifeless atmosphere, unimpressive execution of realism, lack of depth, generic composition, lack of storytelling, uninteresting posing, unappealing character design, lack of variety in time periods, weak execution of different art styles, unmemorable concept.