Re: Say it ain't so!
The man's name is Xi, not Li. And that's just the first thing you've gotten wrong. He's not somehow managing to represent the entire party, with everyone's views forming a part of policy. He's just the one in control of a large enterprise, similar to the way you describe American politics. Meanwhile, he is a dictator who does not need to concern himself with the views of the people. Most parts of the CCP are expected to (and do) support any decision he and his closest subordinates make, without raising issues of their own. If you still think that the party chooses their leader from some miraculous hive mind, read about how Xi got in power and what happened to those other candidates who were under consideration (hint, it wasn't so much fun for them).
I'll grant you that the American people are more likely to give credit or blame to the person at the top, while in China credit goes to the party and blame is best left unacknowledged. That doesn't mean either approach is good. With the former, a leader can get the credit for things they had nothing to do with, leading to support they haven't really earned. The latter, however, is a symptom of the destruction of many fundamental rights and is far worse.