I wonder how much connect there is between those in charge of hardware and those in charge of working software. It would be one thing if the software had a design direction, we all hated it, but it was implemented to its logical conclusion and pure stupid bugs weren't left to linger for years. That would be a matter of difference in taste and vision.
But I wonder if they have the ability to execute... anything, anymore. It's starting to look a little like Windows, which in a totally shameless and burlesque fashion has 3 or 4 design paradigms at the same time, jumbled together in a big stew.
It does feel like the decision making is internal-politics-driven rather than customer-satisfaction-driven, for both Mac and Windows now. Senseless changes that have little in common with other changes.
We've had this for decades with Windows, and internal leaks confirming that it's all to do with turf wars between departmental heads.
As you say, it's an indication that Apple are going down the same road, and are unable to actually execute a vision anymore.