That’s literally how politics is supposed to work. People are a product of circumstance, and since there are a lot of people with different circumstances that constantly change, there’s going to be a competition of power. Democracy, as a concept, exists to facilitate this competition peacefully. People vote for their best interests, and politicians compete with each other to convince voters that they understand their circumstances and will do what’s in their best interest. If a voter feels like a politicians isn’t representing them anymore, they move to a different politicians that represents them better.

You have to be some type of authoritarian to embrace the idea that people are inherently evil or their politics is immutable. If you reject the notion that people can change their views, compromise, or cooperate with each other then you’re fundamentally at odds with democracy, and YOU are the problem.