Each system have their own. Western democracies believe in open and transparent government, which means yes, there are times people are going to just bicker and not do anything, but then the trade-off is that, since nobody can be in power forever, which means any mistake can be course-corrected and it will not lead to any harm to the community.
The Chinese system, on the other hand, focuses on central governmental function; everything goes to where the party wants it to go, and the same type of people basically control the party and are ruled by 1 man. The upside is, power is absolute, so there will not be any arguing, which means whether you like it or not, it gets things done. The downside is that the checks and balances system does not exist, which means it will only be good if the leader is competent, and when the person in charge doesn't know what they are doing, then there will be a problem for everyone, because the government has all the power.
For example, we can vote in someone extremely incompetent like Trump, and then we will get nothing done, but then we can repudiate him and his "policy" in the election, and vote him out or make him impotent, which is what just happened 2 days ago. That will limit the damage done to the country; on the other hand, if a Trump-like character emerges as a leader of China, which none of the Chinese have any say in it, the only way you can get rid of him is either to wait for him to die and hope he didn't give his power to someone even less competent or to start a revolution.
So this is to each of their own.