They like complaining and "being right" is more important to them than being helpful. Whether they are right or not is immaterial to the facts. Whatever the issue is they just need to be seen being right about it.
Incidentally that's a common trait among narcissists.
I paid 1k for my shitty pickup in 2018, it's in worse condition than when I got it, and about 100,000 more miles on it.
It's supposedly worth 3500 now. It needs about $300 worth in parts alone to get it into what I would consider a condition worth buying.
I don't understand.