So far I've seen a great deal of animosity towards Rittenhouse to characterize his personality as that of a slick, cynical, callous youth, insufferably challenging loaded questions and presumptive characterizations.
Of course, that is how someone whose bias against him was deep seated before he trial began would see it. On the other hand, I see prosecutor asking and portraying questions in bad faith, provoking Rittenhouse to defend himself, on occasion slightly defiantly, other times cautiously.
Given the demeanor and highly aggressive and snide tone of many of the prosecutors questions I see nothing in Rittenhouse's reactions that are untoward.
Yes, he has had a year to examine video and learn details. He has had a year to become proficient in technical issues he may not have known at the time of the attack. Yes he has been prepped and rehearsed to anticipate questions and have answers and language appropriate.
However, nothing here changes the facts of self defense, nor exposes Rittenhouse as some kind of fraud. Whatever intent he had (and he may not even have been clear himself) is irrelevant to what he actually did and was done to him.
Underlying actions is the measure of crime, without it, motivations are irrelevant (as is personality on the witness stand).