He, on the other hand, trusted an untested technology with a completely unknown side effect profile simply because the establishment told him to. He exercised blind faith. And he still thinks he's the rational one here. And that is what makes him a midwit.

Exactly. He is unable to work out how he got it wrong because he is unwilling to accept that he could have been wrong in the first place. He can't accept that his opponents might have figured things out better than he did, which is evident by the argument based that it simply came down to "luck". It wasn't luck. He was wrong. Those opposed the the jab were right.

The major issue with an attitude like this is that it prevents him ever being able to improve and get better. A well-adjusted person would take this as an opportunity to learn so they don't fuck up next time, but this idiot can't do that because he's boxed himself into a corner of his own making.