General Contractors don't like you, the concrete contractors you are subbed to don't like you. Nobody gives you any information yet they are mad when the rebar comes out wrong. Engineers constantly making changes which lead to rebar being wrong. Very few successes as far as the projects really making decent profit which is frustrating. Constant phone calls all day long from the field labor sometimes because of shop drawing issues, sometimes because of general laziness, sometimes because the delivery is 30 minutes late.