Your claim is common, but wrong. Approximately none of the major technology companies do more than rudimentary call-center service for bug reports from consumers.
If anything, the entitlement you express is counterproductive, because sometimes people like you convince open-source developers that their time is better spent catering to your sense of entitlement instead of their software.
Source: I am a maintainer of several projects. Some that are used extensively. And I take bug reports seriously, even if I can't always get to them right away.
"it's free, go away" is a real problem. Denying it won't make anything any better or help FOSS get adopted for anything other than servers.
I have experienced it many times before, and almost every time I've gone back to propriety software and breathed a sigh of relief.
Your source is inapplicable. You are not a statistical universe.
Also, "it's free, go away" is a straw man, because the "go away" part is also nearly universal within proprietary software. Try opening a ticket regarding a bug in Word, or AutoCAD, or so on.
The real difference? Those closed products also have closed bug trackers, so you don't get to see all the times users were ignored or told to pound sand.
No, it's like telling the candy maker that their candy made them sick or otherwise left something to be desired. If the candy maker cares about making good candy, that can be useful information, even if they may not have time to do something about it. If the candy maker cares about making mediocre-to-bad candy freely available, then they will say "it's free, go away."
No, it is exactly as i wrote above, the idea isn't to complain back, it is that you get shit for free and you have no standing to demand for anything more than what you got. If free candy makes you sick maybe next time do not accept free candy from strangers, hm?
(of course i knew someone would try to reply with a "No, it is like <insert post ignoring the point here>" but decided to go with it anyway)
If anything, the entitlement you express is counterproductive, because sometimes people like you convince open-source developers that their time is better spent catering to your sense of entitlement instead of their software.