Repeats

If you continue to have problems, please attach the actual score and describe what you are trying to make happen in more detail. Off the top of my head, I can't think of any way using standard musical notation to tell a human musician to do what you have in mind aside from writing it out.

That's a jump pattern that I indeed don't see easily written out for human performers either.
Depending on what your layout requirements are, the closest you could get is probably along these lines:
A B ||: C A :||(3x) D C C1
In which you'll only have to copy the A and C sections once. See attached example, which used the following tricks (also written in the example):

• Set repeat count in the Measure properties of the measure with the end-repeat to 3 for correct playback:
• -> Right-click within the measure to access the measure properties from that menu
• To add the (3x) text anchored to the correct place (at/over the barline):
  1. Make sure to have the advanced palettes open (dropdown at the bottom of the palettes)
  2. Drag a text line from the lines palette onto the last measure before the repeat sign
  3. Right-click the line and open its properties:
     • Clear out the text field of the Begin section
     • As End text, enter (3x), and set the place to "Below", uncheck the Hook box
     • Also press the three-dotted button next to the text field and change the Style dropdown there to staff
  4. In the Inspector, with the line selected:
     • Change the Vertical offset (for example to 1sp)
     • Uncheck the Line Visible box