Why hello, certainly wasnt expecting this.
Apologies about the slow reply, hopefully I can clear some things up for you. It's been a while since I wrote this, so I can't guarantee my information is perfect but...
Based on a dig through my conditions, Ending G is what happens if you use the barrel and then eat from the menu.
That one overrides all other possible endings, so my first suggestion is to try either not using the suspicious barrel, or abstaining from eating off the menu after making that choice.
The determining factors after that are to do with character sizes, The Barrel and business success. I hope that helps, but don't be afraid to ask for followups if you feel the need.