For example, Panama, Chile, Germany, Japan, South Korea all turned out better after US intervention. But Afghanistan, Iraq and Libya got worse.
It is tough to choose the lesser of two evil, when you are in a democratically free country, you do wonder if the opportunity shows up, should you go help others overturn their dictator, and if so, will they then be able to establish a free democracy or will that just replace one dictator with a worse one? But what also happens is the fear, that if more and more countries lose freedom and democracy, and become dictatorships, then countries in free democracies get scared that they will be next, which tend to push them to act and try and overthrow other dictatorships when the opportunity shows up.
Just so you know, there used to be a single Korea. One of them is doing OK now, although it took like 35 years after the US invaded before SK transformed itself into a democratic country, which Koreans did IN SPITE of American support for their dictator. The other one is possibly the worst regime currently active on Earth.
South Korea is really not an American FP win.
Care to elaborate what's your definition of defense in this instance? Do you consider that Russia is "defending" East Ukraine population by attacking Kyiv? (like NATO was "defending" Kosovo people by bombing Northern and Central Serbia and even Montenegro)
"Defense" applies to Kosovo population (of course, official Serbian line is to dispute that too), but I don't see how NATO comes into the picture?
The US does a lot of warmongering everywhere. It mongers at China, it mongers at Russia. It's in fact a big bully, all the more dangerous because of the knowledge that they are slowly becoming obsolete. The EU in a lot of ways acts as a sock puppet for the US, so this is definitely the result of a shared responsibility. Collectively, we should have been better. We were not. Now Ukraine is suffering.
Sorry but please dive a bit into non-western news reports to get a real world view
Granted, the US did a lot of warmongering in the middle east; I get that they wanted to retaliate after 9/11, but instead of rooting out the ones responsible directly they made up a motive (WOMD in Iraq) and did a full scale invasion there; I'm not saying Iraq was a pleasant, peaceful country or that Hussein was a nice guy, but the US invaded it under false pretenses and dragged other countries into it, eventually leading to the rise of IS and a lot of other things that I only have a superficial knowledge of.
But Europe hasn't done any of that, as far as I'm aware they've held a "live and let live" line since the fall of the USSR.