To give you an example: in retrospect, keeping Saddam in power and not invading Iraq is considered a fairly reasonable opinion; i.e. even though we got rid of a dictator, the consequences were arguably worse.
The reality is that the West tends to not get involved politically if the state in question is insular enough to not affect other countries. This isn’t because they condone abuses in these countries, but because a long history of failed colonialism and wars has rendered the West extremely hesitant to get involved in any sort of ‘just’ war that isn’t provoked by the state in question (see Iraq and Kuwait for example.)
The contemporary populist rise of American hostility to China is also linked directly to offshoring jobs from the Rust Belt, so again, there are clearly groups of people who have issues with China that aren’t merely “crush the rising competitor.”
In any case I don’t disagree that the West has sunk democratic movements which were against its interests, but that to say all such attempts will be shut down is overly-simplistic.