Even if the majority of people are in agreement of "we dislike the current people running the government", you still have the problem of agreeing on what to do

Even if the majority of people are in agreement of "we dislike the current people running the government", you still have the problem of agreeing on what to do about it. Some people may want to overthrow current government norms and democracy. Other people don't ever want that, and want to uphold formal structures as is. Some people want to replace leader A with leader B, but others want leader C. Some people want abortion rights, others don't want others to even have that right. Some think topic X is a priority issue, whereas Y is a non-issue, and on and on... All said, politics is always ultimately a matter of disagreement. But you're right in that, if we only could be in complete agreement, things would be resolved rather quickly as there would be no opposition.