I enjoy coffee, but it spikes blood sugar. It promotes the release of adrenaline which triggers the liver to release glucose (stored) for the energy boost the body thinks is required and that glucose enters the blood. Not good for me really, so I thought I'd back it off a bit.
I think many people have dietary constraints, or should have, so it's a fairly common thing but that doesn't make it any easier to deal with I guess. I get what you mean about the meal battle, I understand completely, just from a different perspective.