Some people will always be mad. Being outages on the internet is a hobby, it gives people something to do.
The reality is, if they really were that disappointed with Apple’s products, they wouldn’t be spending time on an Apple-focused forum.
They’d move on and do something more enjoyable to them.
Fan-base complain bitterly and toxically about what they are fans of because they enjoying it.
They enjoy having something to complain about. It gives them their daily jollies.
Complaining is very easy, because you don’t have to make anything better.
There’s nothing more to it than that.