What I can't wrap my head around is objectively, we have it better than human in the past million years could imagine: clean, hot and cold running water, electricity, fresh fruit all year, Big Muffs. How the fuck can we be this damn miserable all the time?
Not enough of us are in bands.
But really, my unprofessional and barely informed opinion is that it comes from a few places. I apologize if this comes off as condescending or whatever or if your question was supposed to be rhetorical. The topic has been on my mind a lot lately so I guess I'm weighing in.
First, the firehose of information about other people is just too damn much. Our dumb brains truly can't handle it so we turn to shortcuts: there's too much to process, so it's more efficient to switch into looking-for-threats mode. I remember reading about some study(1) on polarization and "information bubbles" on social media. They found that it's not so much the bubble itself that causes and reinforces polarization. Instead, it's the constant drip of scary information about and exposure to "outsiders" that really poured gasoline on the trashfire. And now social media has morphed into endless algorithmic feeds that, as you mentioned, heavily incentivize rage bait.
The other big one, IMO, is the widening inequality gulf ("k-shaped economy," anyone?) The floor has been raised in miraculous ways, yes, 100%. But somehow things feel more precarious than they used to. Another week, another 100,000 employees unceremoniously cut loose in the software sector amid another quarter of record profits and record stock prices. It's not that the economy is bad and we're all making sacrifices. It's that a few assholes who frequent a certain island can crush a mid-size city's worth of people's livelihoods for no reason at all. And we're supposed to shrug and say, "hey, that's business!" It's natural, IMO, to feel like this kind of thing is happening everywhere.
So yeah, I think that's the more straightforward and easy to support part of the argument. The fuzzier one that I think is maybe just as important is that we're social animals and our dumb animal brains make us pro-social by nature. We want to both support and protect our group(s) AND look to them for belonging and safety. Everything in modern life seems to tell you those instincts are wrong and you should suppress them. Not to go all "
bowling alone" on you, but we've lost many (most?) of the institutions where we used to be able to express those social instincts and feel a sense of belonging. Some people find it at a MAGA rally. Some people join a band. A lot of people don't find enough and then misery is kind of inevitable.
Obviously the Fender thing is small potatoes in the grand scheme of things. It's sort of inconsequential that one company is being a meanie to some of the people that sell us our music-adjacent toys. But again, we have dumb animal brains and it's totally understandable if the guitar world feels like part of your social circle in some way. A lot of that is para-social, but some of it is real relationships! I don't love Phil McKnight's videos and I'm sure he's playing up the drama for views, even if he doesn't 100% realize it. BUT I wouldn't be at all surprised if his emotion was totally genuine. Maybe he shouldn't try to spread his negative emotions to his viewers, but that's another topic. I think you're right and we should't let ourselves get all worked up over some minor tempest in a minor niche of human existence. I also think people getting worked up about it is totally understandable and kind of inevitable.
In conclusion, we should all join shitty bands and just be around other people and try to remind one another that it's ok to care about things and it's okay to log off the internet when people try to piss you off for profit.
1: I think this is the relevant study but I'm not 100% sure: https://www.pnas.org/doi/epdf/10.1073/pnas.2207159119