* https://en.wikipedia.org/wiki/Wikipedia:General_disclaimer
I'd say Wikipedia is really to blame for creating this false sense of trust on their platform. Not that they are completely unreliable, but they are less so than they seem to an average user.
But that is not what the author of the comment did. They regularly messed it up, and then complained that other people didn't clean it up fast enough. It's like throwing out trash every day out of the window, and then feel offended that there's lots of trash on the street. Of course it is, you made it! Stop doing it, and there would be less trash out. Start cleaning up, and there would be even less.
I'm ok if the person just has complaints, but if he has complaints about the thing he himself actively tried to break - no, you should not feel entitled to complain about that.
It is fascinating that some people talk about global topics like climate, evnvironment, etc. and then can't even resist messing up things that is under their nose, given to them completely free and extremely easy no to mess up - just use it as a normal person and enjoy! But no, he needs to vandalize it and then complain it wasn't cleaned up quickly!
I can assure you that there are at least some who are unaware that even they can edit a Wikipedia article. My housemate (a computer engineering student) didn't. My girlfriend seeking her doctorate degree didn't. My 2 roommates who managed to get to the first 100 at our national examination, also didn't.
Printing something in a book doesn't make it true, and putting it on a website also doesn't make it true, no matter how professional and authoritative-looking the css is. You trust something because you trust the motivations and expertise of its sources.
It would only be natural for us to take this resource as not-so-reliable, for that it is as easy a man to spit on the floor to infiltrate Wikipedia with false information. Yet, we usually don't. We usually just go ahead and trust what we see on Wikipedia, and maybe that's because it looks so convincing and reliable.
If Wikipedia cannot handle vandalism, maybe it should then warn it's users to realize that there is some higher chance than they might expect that the article they are about to read might have been compromised in terms of correctness, or has never been correct to begin with. Instead of displaying full-page banners, perhaps they should spare a couple of lines to such disclaimer statistics.