This isn't to excuse it. But to give you a map of a sort. I know it sucks as a new person, and similarly I know this is way too long for a simple guide. It's complex, at least, for the parts where people don't mean to be (ykwim) but still are/come off as it, and at least knowing how it happens might help navigate/dodge some of it.

You're right to be frustrated and angry about it. Please keep being frustrated and angry about it, because that's how change happens. That's not to say the burden is on you to keep complaining until things are fixed, but that when it happens, be annoyed about it.

tl;dr:

1. linux support is largely a gift-labor 'industry' with plenty of people exploiting that
2. on windows, companies have done the install path enough and troubleshooted enough that they have support flows for that usually. Linux does not because there's too many ways to do things, and too low a population, so they just don't bother.
3. the other 600 randos this month getting ornery that the free support wasn't as fast or detailed or broken-down as corporate support means people will false-positive a lot.
4. the problem with linux support forum regulars is they're forum regulars, with all the problems that causes and how it makes everything into game of thrones for who's the coolest in the member list page no one looks at but them.
5. you're right to be frustrated and angry about it. please keep being frustrated and angry about it, because that's how this changes.
6. it used to be so much worse. I know that doesn't help, but maybe it'll help plot the curve, so to speak.