:::spoiler I'll offer my own answers as well.

1. The CPC

2. I agree, though I think it may have gone too far. Allowing billionaires is a dangerous gambit due to the possibility of them gaining political influence, and allowing landlords was a mistake. However, these reforms have helped lift 800 million people out of extreme poverty and were necessary at the time.

3. Land reform, the Barefoot Doctors program, Deng's reforms, and the Belt and Road initiative have all been very successful and increased the standards of living for an enormous number of people. The CPC has had a focus on improving the lives of their poorest people, and in that regard they've done a very good job.

4. The Great Leap Forward, the Sino-Soviet split, the Cultural Revolution, LGBT rights, and past China's foreign policy such as supporting Pol Pot/the Khemer Rouge and invading Vietnam. A lot of the blame for the Sino-Soviet split lies with Khrushchev, but I think there's enough blame to go around. I think the Soviet policy of "peaceful co-existence" was more correct, and more in line with what China ended up doing anyway (libs will roast me for that, I'm sure). Some positive things did happen during the Cultural Revolution (such as the above-mentioned Barefoot Doctors program), but generally it was a chaotic mess and I'm not sure it accomplished very much. The GLF had a lot of factors, including the Sino-Soviet split, but there's plenty of blame to ascribe to Mao (the sparrows did not, in fact, deserve it)

5. Kind of trite but one take-away is "seek truth from facts." When Mao was successful, it was because of his experience living among rural Chinese, and looking at what they needed. Where he was unsuccessful was when he got too caught up in theory, sometimes assuming something would work without paying close enough attention to whether it actually was. I consider the overall political project successful due to the improvements made in people's lives, but how the devil's bargain with the capitalists will ultimately play out remains to be seen.