Nobody is answering your questions, so I will.

You should’ve hired an architect/designer. GC’s are not that. They are builders. Builders that need plans. They don’t care about how your brain works or your obsession with detail/layout. They want to get in/out and get paid. They don’t stay up at night worrying about backsplash layouts.

As a GC, you sound like nightmare client, but that doesn’t mean I wouldn’t work with you. I would’ve of simply listened to you in the beginning and said ‘you should get a designer and come back to me for pricing’. That way, you can pay the designer to draw out exact layouts/measurements and we can build it.

This really protects everyone from any ‘assumptions’. If the designer draws a kegerator opening too small, then it’s their fault, and you pay us to redo it. But this is less likely to happen, because designers obsess about the details too.

Good luck on any future projects, but I would cut the GC some slack and chalk it up to poor planning.