One thing I’d suggest is looking at the state of China when the PRC was established (in other words, when the communist experiment there began in earnest, in 1949) and now. Look at things like life expectancy, education, infrastructure, hunger, poverty, quality of life in all manner of speaking between then and now and you’ll see that what communists have achieved in China is nothing short of a miracle. It’s possible that some of the things you mentioned (LGBT issues in China is something I myself would need to learn more about) may be legitimate criticisms but to feel “extremely negatively” overall about a communist project that has saved countless millions of lives from capitalism because of a few areas where they still have some room for improvement is likely just the result of western propaganda. It’s worth noting how the Chinese people themselves feel about their government as well.
