In addition, people do not even try voting for the best candidate. People usually vote for the candidate whose interests best align with their own interests and

In addition, people do not even try voting for the best candidate. People usually vote for the candidate whose interests best align with their own interests and if we're talking about that, then we can't avoid talking about compromises. Which is why it's easy to see why preferences between candidates may be non-transitive, as the space we're talking about is no longer one-dimensional so candidates don't have a natural order.