I live in China as an expat. I haven't seen any bashing of US companies from the media in the limited amount of Chinese media that I consume.
There is propaganda everywhere but it is about China. They don't tend to bash other countries but keep going on about how good China is. They just ignore everyone else because China is everything.
The US media bashes China all the time but that may just be because I read English news. If you have seen the Chinese equivalent I would like to check it out since I haven't seen that side of China yet.
The Chinese people are strongly nationalistic just like people from the USA (I'm from Australia which is nice ... but not really important). Social media is big over here and people organise boycotts of companies all the time.
You said "state-controlled media puts out massive amounts of propaganda railing foreign firms" and "China is far worse". It should be easy to find one if this is true otherwise it is just "fake news" that gets repeated so often that people think it is true.
It should be easy to find one example.