That sounds like a cannondale issue rather than BB30.
Exactly, one example is the brake cable/housing having too much friction due to poor installation, blindingly obvious when you have Trek next to it that felt butterly smooth, no matter which levers.
ok fair enough, I was lucky my caad10 had the groupset replaced by the previous owner as they prefered sram over shimano that it came with.
Either way, that sounds like a cannondale issue rather than BB30.