Culture is not about the furniture in your office. It is not about how much time you have to spend on feel-good projects. It is not about catered food, expensive social outings, internal chat tools, your ability to travel all over the world, or your never-ending self-congratulation.
Culture is about power dynamics, unspoken priorities and beliefs, mythologies, conflicts, enforcement of social norms, creation of in/out groups and distribution of wealth and control inside companies. Culture is usually ugly. It is as much about the inevitable brokenness and dysfunction of teams as it is about their accomplishments. Culture is exceedingly difficult to talk about honestly.