The imperialists in the bush administrations were the exceptions. There was a clear difference in American foreign policy between Bush Jr. and Obama.
It is important to recognize that countries do not have a foreign policy, presidents do. We can only describe trends that the presidents tend to follow. Iraq was not some shadowy CIA cabal, it was George W. Bush and Dick Cheney who had power at the time. If you want to characterize US foreign policy by public polling for support in the war, it is very clear that public support for the Iraq war has evaporated since 2003, which is why the US didn't intervene in Syria and let Russia and the Kurds duke it out. Fatigue from the Iraq War has also been used by Trump and his supporters to limit military support to Ukraine, NATO, and Taiwan.
Also, the Gulf War is not a good comparison. The Gulf war was a UN-directed intervention in response to the invasion of Kuwait. It was not a invasion coup like 2003.
Relevant video essays regarding American foreign policy post Cold War and the Russian propaganda depicting the US as "coup happy imperialists":
https://en.m.wikipedia.org/wiki/US_intervention_in_the_Syrian_civil_war
Obama did not do anything until the airstrikes against daesh, and even then it was very controversial for Obama in the US News. Less than 10000 us special forces have been in Syria, and Assad is still the dictator of Syria. Compare to the wars in Iraq, Afghanistan, Vietnam, etc. where the US was in direct conflict with another state.
12 years of administrations don't count because they're not Biden, the current president. What the US does right now has nothing to do what it did in 2003. The US foreign policy cannot be 80 years of regime change in South America, because the current US regime didn't exist before 2021.
Its not brainwashing to defend peaceful democratic opposition to dictators. Who are you going to complain to about imperialism if the US and EU give up on democracy and everybody lives as serfs under the thumb of some warlord?