Unfortunately,
psychology tells us otherwise. When people are faced with evidence that they're wrong and that their entire worldview is false — including the belief that Trump is a great leader — they tend to dig in deeper, spinning out ever more elaborate rationalizations meant to explain that they were right all along and that reality-based people who disagree have sinister motives.
To make it worse, these conspiracy theorists have been constantly empowered and enabled by Trump, who is a conspiracy theorist himself. With his daily tirade of lies, hunches, harebrained theories and baseless speculation, Trump has helped normalize and encourage his followers to just invent reality for themselves. Worse, the fact that he continues to get away with it helps bolster their view that there are no consequences for flouting reality so boldly.