As your company grows, as your span of control grows, and most importantly as you grow as a leader, you need to scale yourself. The way to do this is through: 1) Mindset; 2) People; and 3) Process.
Being smart and great at your job is only part of the equation for success - and not the biggest part. You also need to have credibility and the support of those around you. Getting that support - especially if, sadly, you have alienated people already - takes effort. Three tactics to help: 1) Get sponsors; 2) Create positive buzz; 3) Challenge productively.