To fix that you need either unequal votes or to remove the voting rights of those with incorrect opinions and understandings. Maybe education but then you'd have to make reeducation camps for those of incorrect opinions and understandings since educating the entire populace will mostly just move the average bar higher.
I'm not talking about doing referendums on every single issue direct democracy style and I am aware that to correctly implement something like this you'd need to do it gradually so that the populace has time to adjust to their increased political power which will hopefully increase their interest in politics in general.