Sometimes it’s ok to follow a formula. And some “plot holes” are actually “plot devices”. You have to move the story along in some form of a predictable manner especially with a perceived big budget blockbuster where they need to get butts in seats to justify the cost.
Deadpool for all the talk of it being ground breaking (and it is in the sense that it’s the highest grossing R rated flick ever) really follows the core of DP from the comics to a T with the notable exception of dealing with his sexuality. Otherwise. It’s very “by the book”.