Politics is indeed cruel, they don't know who is a friend and who is a relative, in their eyes all of them are opponents who can make them fail in politics, they can manipulate them with their good behavior to show it in front of the public so that they are moved to want to elect a leader like him, after he is elected they will forget all their promises during their campaign.
In almost every democratic party something like this happens, now the people understand their behavior in front of society, as if they really care about the people even though it is just their trick to get people's participation in winning in the world of politics.
Indeed, we cannot deny what you said, but behind that there is also the behavior of our own society that pollutes democracy, namely with money politics, it is now entrenched among the community during the democratic party, this condition is very difficult to change if it is not the democratic actors themselves who change.