You can clearly see it in the Netflix doc. I don't know what his official diagnosis is but he was definitely off even back then. He might be a person with high functioning asbergers.
Yeah I feel like a lot of ppl with mental issues who happen to also be highly driven like Kanye can compartmentalize the issues and become outcome-focused when they realize they must contain them to reach their ultimate goals. When those goals are reached all hell can break loose tho because the same level self-discipline is no longer necessary.