I have to try this. I already have a reverser (how on earth is this not the default, and not even an OS option to begin with?!?) but scrolling with the wheel on a usb mouse jumps randomly. Crossing fingers this may help there.
You have always been able to reverse the scroll direction in the Mouse/Trackpad options. It’s a checkbox that says “Scroll direction: Natural”. As for your jumping issue that sounds like a hardware problem. It might just be that your mouse wheel is dirty.
Yes, but, for some reason, changing this to the old direction breaks the volume / backlight in the menu drop-down panel.
Which is clearly a bug because:
Scrolling up / down always changes the volume the same way: down is lower.
But if "natural" is unchecked (so scrolling down moves content up) then scrolling left moves the volume control to the right. If "natural" is checked, then scrolling left moves the control to the left.
This behaviour has been broken at least since they introduced the horizontal volume panel, not sure which version that was. Not sure how it worked before, because it had never occurred to me to scroll sideways on a vertical control.