Yes, I know there will be sampling bias, but multiple western surveys show high approval rates of China in China, in the 80%+ regime compared to <50% in many western countries. They show the same for Russia too. Which match domestic polls.
The problem with Iran is that yes, they actually are that infiltrated. They might not be pro west to the point of open rebellion yet but clearly there are enough rats to not only build a saboteur base inside Iran, but have a population apathetic enough to let it happen and not report it to the police.
Xi Jinping remarked that despite millions of members, very few CCCP members came out to defend the Soviet Union against Yeltsin and the public was apathetic. This sort of apathy is much easier to do.