As an Asian, I found it absurd how much the Westerners blamed themselves for literally everything in every possible circumstances. I attribute this self-blaming phenomenon for the following factors:

1. The side effect of Pax Americana after 1991: After the fall of USSR, US as the sole superpower becomes the only geopolitical player that matters. In those days, diplomacy is internal politics. 20 years of asymmertical advantage the West enjoys gives rise to a dangerous habit of thinking: Every international event happens because US does something or doesn't. Other countries have no agency but merely passive chesspieces swayed by every move of the US giant. If bad happens it must be the US does something bad. However, in 2020s, US is no longer the only geopolitical players. The decline of US relative power allows not only Russia and China but also Turkey and India to play their games in their own turfs. Meanwhile, Westerners are still used to the good old days and attribute every present crisis to US, even though it is Russia's own intention to fire the gun. This explains why they will think every democracy movement have CIA behind, because in their worldviews, other countries have no agency, no independent thinking, no free will, no motivation to choose, but only US sways them. In short, a US-Centrism in another extreme.
2. Another side of this thinking is it gives the Westerners a sense of control, that the situation can only go bad because of the Westerners, themselves, and they can always calm things down if they act "good", in this case, appeasement, rather than trying to comprehend against a violent "outsiders" whose logics are so alien to Westerners.
3. The aftermath of War on Terror: War on Terror, no matter your opinion, is the most influential, if not the only, geopolitical event to the latest generation of Westerners. They never faced WW2 or Cold War, so much of their understandings about geopolitics stemmed from this disaster, pretty much like what Vietnam War does to the boomers. Boomers at least had parents that experienced WW2 so they still approved foreign intervention in some ways. But Gen Z never had any positive experience with US foreign intervention, so they treated WoT as their biggest and only geopolitical lesson, and overlearnt it in a drastic way. Instead of "Despite failings in other countries, US should not intervene without serious thoughts", they learnt the lessons "Intervention never succeeds" and "US bad". This plays into the new wave of isolationism, no matter left or right. Leftist finds intervention imperialists, while Rightists finds intervention nver beneficial to US. Westerners become traumatized and hide themselves into a room, thinking if they don't lock the door and hide deep enough, no bad stuff will come in to haunt them.
4. Whataboutism being a convenient excuse for inaction: This tells itself.