I believe that most of users that are complaining, actually don't know what they're complaining about and the other part of users that do know, are just asking too much. They want the same performance as the top flagship phones.
Those that don't know, that's comparing our camera to a 5 year old and much cheaper phone have not used the correct setting or, they were unintentionally shaking when taking the picture. During night time it's almost impossible to take good pictures without the hands of a surgeon.
Here's a good example of a user that made this kind of comparison and then changed his mind after some further testing.
https://zentalk.asus.com/en/discussion/comment/31656#Comment_31656