I want to make a horizontally aimed ScrollingFrame, I tried rotating, but rotation is hard to control and design, so I wanted to ask if there are any other ways of doing so?
ScrollingFrames already support horizontal scrolling. You can restrict it to only the X axis by changing the scrolling direction. Your canvas just need to be larger on the X axis for the horizontal scroll bar to be displayed.
UI layouts can also be switched to horizontal mode via the properties.