The cultus of this guy is still going strong, and he seems to be getting better at creating it completely regardless of what happens on the pitch, judging by how feverish and rabid some of the new Mourinho chauvinists are. Any thread that might have something to do with Roma is polluted by his fanatics on a regular basis.
It's hard to tell how much of this is even deliberate and premeditated on his part, in a sense that he planned for it early in his career, or if it's just something that arose spontaneously out of the chaos and misery he normally inflicts on clubs.
Regardless, him being cantankerous and obnoxious, pointing fingers at everybody but himself, blaming the owners, the media, the referees, unfetteredly, is something that really feeds into the dissatisfaction of the fanbase (of which there is always some, and negative hyperbole is the rule of life). So him 'connecting' with this aspect of fan life, creates him plausible deniability which does wonders to protect his reputation.
That he was right, in some sort of visionary sense, beyond whatever individual points he might have been right on through his self serving rants, is a fatuous contention. It requires constant butchery of facts and mental gymnastics.
The most absurd aspect of these "he was right all along" narratives involves him supposedly being a prophet about Paul Pogba, and recognising what a virus he is. This in complete denial of the fact that Mourinho was the one who signed this virus in the first place, inducing the club to spend a transfer record on the said player. This in addition to signing countless other players (some discovered by Mourinho's own network) who turned out to be complete dross. For the longest time, not signing Harry Maguire (initially) was also part of the he was always right narrative, that is before Maguire became the universally despised figure that he now is.
On the back of the club not signing this guy because they had reservations about the price and quality (that hindsight has cast a kindly light on); Mourinho justified himself in deliberately sabotaging the club by playing midfielders at centre back. How this disgraceful thing is forgotten, and how lip service continues to be paid to this narcissistic asshole, is forever beyond me.