To be honest, I can't believe this movie even exists.
It's not like Deadpool is some impossible to decipher art film, or like the plot is impossible to follow. It's more a case of "Fox has never been this loose or this adventurous with any of their franchise superhero properties, and I'm not sure how anyone convinced them to do this," and if for no other reason, I salute the studio for taking this particular chance.
And while superhero films are enormously popular and the X-Men franchise in general has been a steady performer for the studio, make no mistake: Deadpool represents a genuine roll of the dice. Aside from the R-rating, a first for this franchise, it's also just plain weird. Structurally, I can't think of another film quite like it. It's two scenes as well as some flashbacks and connective tissue. That's it. In one scene, Deadpool attacks a bunch of cars to find a guy. The guy gets away and, in the second scene, threatens Deadpool's girlfriend so they fight. That's it. That's the entire story. It is almost preposterous how little "plot" there is in the film.