I think America has an entitlement problem wrapped up in capitalism and the narrative of the American dream combined with relentless marketing of success as the only suitable life goal. Goes like this:
1. Americans grow up with the expectation of success and fulfilling the
American dream. The problem is that this actually takes effort.
2. With financial success being pretty much the only unifying cultural touchstone in the USA, pretty much every interaction with people is the kind of zero-sum, cold, and arms-length kind of procedure Donald Trump has popularized. People exist to be used to enrich oneself, there isn't really another purpose for other humans. Not only this, but financial success vs other people is a key metric of self worth in the USA which goes
pretty friggin deep.
3. We have seriously messed up perspective on sexuality in the USA
4. Anger, especially male anger, has been strongly associated with entitlement and not meeting expectations (with regards to relationships with women, careers, etc)
So we have a lot of people, particularly young to middle-aged men (of all races, to be clear) that are angry about not achieving what they feel entitled to have without any real empathy or connection to other people outside of transactional ones who, in the end, have a wanton disregard for human life and essentially nothing to live for. And they can pretty easily get guns. Criminal shootings (like gangs in inner-cities like Oakland/Chicago) are different, but have a lot of the same drivers except instead of an act of rage we get turf wars over resources - which goes back to point #1 & 2 again.
The whole epoch of influencer-driven media has supercharged all of this of course, because the success flexes (which are nearly always delusionaly exaggerated anyways) and the sexual denial are now
inescapable.
The sad part is that I don't think the USA was always so singularly focused on financial success - yes, we've always had the tycoons and more recently the celebrities, but there seemed to be fairly stable content with kind of ordinary life. Something weird flipped in the 70s and 80s when investment and the finance industry went from a background process to a very conspicuous part of everyday life and everything became so cash-money oriented. Probably a combination of the descending interest rate era from roughly 1980-2022 and the invention of
the securitization of everything and Reagans destruction of faith in American institutions just really broke this country - nobody trusts anything, everyone wants all of the money as a virtue signal, and everyone is boiling with rage for not getting what they think they are owed. And ALL of them can get guns to vent this rage.