I think I read a piece on Stratechery that the reason for Apple's poor services is not so much due to infighting or incompetence, but because the company is organised along making great hardware, which in turn is a poor fit for refining software.
Simply put, Apple is a victim of its own success.
https://stratechery.com/2016/apples-organizational-crossroads/
So what the writer suggests that Apple does is to spin off its services into a separate company and make the people running that organisation accountable for every last cent of profit they make. This would give them more incentive to improve, while also freeing them from the yokes of Apple's organisational culture.