The problem here is that the MC wants to come off as hero and savior of the girls but in reality he's as much a predator as Big John and Uncle Carson. His main goal seems to be to take over, not help. After things mom tells him the need to eliminate Carson shouldn't have even needed a second thought on his part, he should have already came to that conclusion on his own. Too bad the "good guy" in this story isn't actually a good guy.
Nope, avoided alpha points and MC still inexplicably gives Big John a day to consider things then still makes a stupid deal to keep things running instead of hanging John and most likely Carson out to dry which would have been easy. so he still chooses to become "Little John" and a predator in his own right instead of actually trying to help the girls and being the man of the house. Guess it wasn't me, MC is still well on his way to being just another John.