Judging by your name, I presume your Romanian. I think it’s very much ingrained in eastern European culture that sitting around this bad whereas more western cultures do not condemn it so much.
So part of your hating the boring activities might be a cultural thing as well, even as a child. Also, it’s a deeply eastern European thing to have to wait around too much at the doctors office.
However, I have the same experience with hating it, but I don’t think I had the balls to try to negotiate myself out of it.