I have spent a decade on these forums. Not sure what you are discussing here that Apple buries criticism. Are you referring to criticism on this forum? I did not know this was officially endorsed and operated by Apple Inc.I don't deny that Apple has reversed course on some issues. But I would argue that those instances are less than those in which they ignored the customer.
If you have spent any time on the Apple forums you know that Apple buries criticism and problems and that they are aggressive at it. The best I can say is that Apple is SLOW at responding to customer pressure. They do respond as you've shown.
But citing your example of the MacPro trashcan, how many years was it before Apple introduced a new MP?
Two more things I'd argue. If Apple does respond it's more than likely in response to a company. Who was/is the primary user of MacPros? Business, particularly those in the design/professional industry. Apple responded because losing the business of the business customer was more of a threat.
The second thing I'd argue is that when Apple DOES respond it's the way they WANT. Yes, they will offer the solution to the problem but it may not be exactly the way it is expected.
So, ultimately you're right. Apple does respond. But when and how and to what kind of customer pressure is debatable.
Everybody has complaints about everything. Does that mean Apple ignores it? You can never....EVER....make 100% of your customers happy. And if you try to, you will make others less happy. Its a never ending cycle. Some have issues, some dont. However the BIG issues, like the trash can Mac Pro and the ports on the laptops, are getting addressed. You also need to question initial complaints if they are just "growing pains" or not. The complaints in 2016 about USB-C only, was that just because it was new? I am sure they got a lot of complaints when they dropped the Floppy and disc drives. Doesn't mean Apple ignores them.