Unfortunately I don't have good news, hopefully someone else has some solutions. The main issue is the bend in the handlebar, so an option could be to use a normal stem/handlebar (or externally routed one piece handlebar) and run the cables through the headset at a shallower angle. Maybe there's a type of cable and/or housing that has less friction for tight bends, or a lubricant that can help. I could never get mine dialed in so I went AXS.