Our team values are on the wall but our real behaviour is the opposite. What do I do?

Values written on a wall are just words. The real values of any team are whatever people actually do when it matters. If the poster says collaboration but the room runs on competition, blame, and hoarding, then competition, blame, and hoarding are your true values, no matter what the sign claims. Everyone feels the gap, even when nobody names it. That gap is not harmless. When stated values and real behaviour drift apart, people learn to distrust the words. The nice language starts to feel like a cover story, and it quietly teaches everyone that what you say and what you do are allowed to be different things. That lesson spreads further than any poster. Close the distance by starting with yourself and something small. Pick one stated value and live it visibly this week, especially when it costs you something. Share information you might have kept. Take blame instead of passing it. Culture does not change because the wall says so. It changes when people watch you do the thing the wall only talks about.