It’s not the public’s fault that they are gullible … it’s the fault of an entire community of professionals, politicians, academics, journalists, media owners and thousands of other people in the industry that don’t mind working and living in a world that has all it’s information funnelled through a very narrow opening owned and controlled by those with all the power and money.
That's simultaneously reductive and painting with a broad brush. I can't really speak to the motivations of those outside of journalism, but if there are reporters gleefully misconstruing things sted challenging their livers to a death match, I've not met them. Sure, the folks holding the purse strings have differing views, but they're not the ones going around and committing journalism in broad daylight.
We don't expect schools to report the news, so why should news orgs be teaching media literacy? This isn't a flippant question; education was intentionally gutted in the states starting under Reagan to produce a gullible enough population to allow Trump's grotesque ascent. Putting a government failure on your local paper (if you still have one) fans the distrust further, so that's not only misguided disappointment but contributes to the precise collapse you lament.
The other thing to bear in mind is the number of seasoned journalists who've tapped out from the bullshit content-production grind that really gathered steam about a decade ago. We don't want to produce what shareholders want us to run. So you have kids fresh out of college at national outlets who will be gnawed to the bone, spat out and replaced in three years. At least there isn't that pesky copy desk draining resources by fact checking.
The people doing the work are not to blame. Casting it on them is demeaning atop the already miserable circumstances they didn't sign up for when they were young and idealistic and thought journalism could be a fun way to change the world.
Unbridled capitalism, and specifically private equity, is the problem here. Our economy is no longer set up to encourage independent journalism at scale; blaming the victims in the newsroom is gaslighting at best and toeing the party line somewhere in the middle. When someone gets rear-ended on the road, nobody says the car that was hit was the problem in the first place.
Many independent outlets are not hard paywalled, e.g. 404 Media. Yes, you have to provide your burner email, but that's really not a big ask in the era of mass government and corporate surveillance.