Very well said!
It's a trope and it has been happening for decades (at least 32 years I've been on it) all over the internet.
It has only got worse and worse with time.
So you got, popular with a high public profile company some random event that can be used a justification for trash post and soon you got a slew of "Owned blah blah blah blah since blah blah blah and now it's gone to crap because blah blah blah. (tm)". It's basically a "button pushing" contrarian position, seeing what rises they get is the whole point of those posts.
You can easily distinguish people that post those things cause although they claim to have owned Apple products for ages, they seemingly don't know anything about Apple's historic pricing, policies, engineering, business or ethical decisions or even the products they claim to have owned. The argument is always over the top bordering on histrionics unrelated in proportions to the alleged Apple fault. They often claim to own a ton of recent Apple products they bought well after, by their posting history, starting saying everything Apple does is a piece of crap.
People who actually owned Apple products for years don't usually feel the need to constantly remind us of that fact and if they do, it seems to be backed by actual real world usage in the way they speak about those products. The arguments are usually more level headed and based on what is actually happening. Their post history reflect a conflicted recent view of Apple that had an effect in them buying less products, not more!
So, I'm not against people feeling Apple let them down in a narrow sense.
As for trolls.
Yeah, it does takes a twisted personality to be a button pusher and live in a forum you despise all the time, but that's where we are right now. On Youtube, Instagram, Yahoo forums, whatever... Everywhere it's the same thing: trolls, trolls, everywhere. No conspiracy needed for such a thing to happen, just the knowledge that if you get enough losers online (which has happened in the last decade for sure), there will be consequences in the quality of overall discourse.
And yeah, I've been on the internet since 1985 (it did exist back then for people in big engineering degree granting universities ) and I'm pretty good at knowing the motivation behind the posters after all this time.