When you turn clockwise, you move down when you’re on the right side.

To scroll down, you move the slider on the right side downwards.

Idk, it’s intuitive for me, but I guess that it’s like inverted controls on videogames. What’s comfortable for you depends on how your brain works.

I think of it as a (the world’s ugliest) cogwheel.

I would say scroll down the page if I wanted to see more of the information on the bottom of the page.

The scroll bar needs to move down

It’s the difference of controlling the character (mouse down -> head tilts down) or controlling a camera attached to the character (mouse down -> camera moves down -> camera stays pointing towards the character’s viewpoint -> view angles upwards) to me.