Compared to what other bikes you didn't like?

Endurance really isn't a particular set of geometry numbers. It's more what you can comfortably ride. Some can do that in a very aerodynamic position or "race" fit and others need to sit up more.

So knowing what bikes you rode before will help us know if the BMC Roadmachine is any better a geometry to go in the direction you seem to think will make it fit you better.

I didn't look, but I"m guessing the -12° stem angle is to make the stem roughly horizontal to the ground which makes for better aesthetics. if you need a higher bar position you can simply flip it if it's not a integrated stem and bar. Remember the head tube and steerer tube are on a angle too so having no angle on the stem would look weird to many of us.