I mean, belt dressing isn't totally a scam, it's just almost never the right fix.

10 pages for a two scene character? That sounds completely insane but also I totally get it. I accidentally wrote a 3 page backstory for a bartender who was just supposed to pour drinks and say "rough night?" and now he has a dead wife and a gambling problem. Your dialogue only story thing sounds like torture honestly. I tried a story where I banned the letter E once and my brain nearly melted. But you're right about the truck being a time machine, I found out the dad used to smuggle watermelons across state lines in the 70s which makes zero sense but explains his whole vibe.

Did you try finding out if the creators ever shared their planned ending anywhere online?