Because it quickly touches upon very profound aspects of the character, bordering on depression, that weren't as clearly defined before, and then resolves them just as rapidly as they were introduced. It’s as if a deeply complex issue were settled by a sudden, fleeting realization. Furthermore, it’s unclear how this might relate to Sanji’s own desire to become a "king." Personally, I feel there was a lack of focus on Sanji’s internal, subjective experience, especially regarding his dream of finding the All Blue.
Sanji wants to stand above others to protect those he loves weaker than him, that’s where his strength lies. That’s why last chapter was so integral where Sanji had to come to terms with the fact that he needs to love himself before he can truly be that.
It’s only rushed if you ignore the buildup that took place over the past few arcs. This is just a conclusion to an arc decades in the making







. Maybe a fusion of sorts btw Kiringham & Longinus or Kiringham equips another one of those legendary weapons an armor type this time to defend against Sanji’s attacks
