I never suggested Genjutsu 1 shots him she's not at Itachi's level in that yet it's enough to confuse him and allow Sarada time to beat him down. The only way Boruto is avoiding the genjutsu is if he knows he's under its influence which from the way sarada uses it I highly doubt it.Boruto wouldn't get defeated by Sarada genjutsu. Boruto can use close feints to avoid it and Saradas genjutsu is not as strong as 3tomoe to 1 shot him. Also gale palm is not like A's lightning armour which increases his overall speed and reaction time. Boruto is trading one thing for another with gale palm
I agree Gale Palm doesn't work like rai armour it causes blurred vision or something like that that's why Shizuma water slapped him like a small fry and he wasn't able to react to it. The gale palm is able cruelly able cruelly major weakness in that aspect.