How come is it that I apparently have an "above average" IQ and still feel super dumb?

It's always very hard for me to focus on stuff that I'm really not interested in, like, at school, w certain subjects, I was always too quick to get bored and couldn't get myself to actually learn something.

I took some tests a and I'm moderately, not a lot not too little either, above average and I mean. I've always felt like stuff is more difficult for me.

I remember years ago I got a similar result but, like, I don't think that's ever reflected on my everyday life.