Yes to foreigners the tightening up on access to foreign websites is a nuisance, incl. to me when I'm in China.
The fact is that the majority of Chinese don't like the western sites but prefer their own, which is much more atuned to their way of thinking. Most Chinese use sites in Chinese language, like Weibo, Baidu etc. which are eqv. to popular western sites like Twitter, Google etc.: http://daxueconsulting.com/market-analysis-chinese-website-design/
Much like most Americans rearly look at foreign websites, or news channels, especially if they are in a foreign language.
If you are in China and miss familiar showes from home, here is some advice on how to reach them: https://www.duchinese.net/blog/41-top-5-websites-to-watch-western-tv-in-china
In fact it is not only China that is - or would like to - curbe access to certain things on the Internet. Many countries are getting fed up with the dominance of the web by American companies and the way they use that dominace. Some form of control is bound to be implemented by most countries, unless they agree to abide by the reguations imposed on local Internet companies.
I'm not sure if any restrictions are imposed in America on any foreign or domestic sites spouting anti-American views. If there are, you will hardly be able to detect it, unless you are looking for any spesific such site that you know of.
The Chinese print press and TV news are getting more dearing and critical in their reporting, but nothing near the level seen in America. Many would say that is a good thing, looking at the level of redicule and disrespect that is being shown to your political leaders in certain media.