They've constantly proven over and over again that they're far smarter than I am. They have university educations, I failed my end of school exams. They always know something weeks or even months before I hear about it from another source. I can't call them stupid as that isn't proof that they're wrong.
And yet they say things that are wrong, and stupidly wrong, all the time. If they are wrong that much, they are stupid, and they need to be called stupid.
Stand up for yourself.