Just because Jack is a socially retarded idiot doesn't mean he breaks the trope.
On the contrary, it actually helps make the argument.
Jack is literally sidetracked in his quest to destroy Aku by Ashi who insisted that Jack "show her the world" and prove that Jack is not the villain the Daughters of Aku were indoctrinated into believing.
Being a jaded world-weary hermit is all part of the package, my dude.
Now, when Luke and Rey have their romantic subplot then it'll break the trope as we watched Rey develop into her own character independent of Luke in the 8th movie....