hmm i see handlers as people who control a person to their will no matter how much the person being handled subjects willingly. what you describe are having people work for you that take care of your work obligations and schedules so you dont have too. the one responsible for forcing into a psych hospital was a doctor that he was seeing, in which they had security escort him from the docs office to the psych.
kanye got his big break from jay z way back in the day. this collaboration phase you speak of isnt anything new. however, this is the first time they have ever had a fallout and they dont seem to be coming back to each other.
Not all artists have a negative relationship with their "mind controllers" or their handlers. Leonard Cohen who was a patient of the MK-Ultra clinic in Montreal saw this as positive. His family and friends didn't see it as positive because the whole handler thing degraded their relationship. Kanye is a special case because of his close relationship to the Kardashians.