Aaargh I know right, I had the same frustrations myself when I dirst ran afoul of this one.
@Tolomeo are you on an Official Server mate?
There may or may not be a quicker way. I am certain (please forgive me if I am wrong, I have not tried this for literally years now) that if you spec up to Agility 20 and take the Extended Leap perk, you can jump up the right hand path early on in the dungeon. It is the one you would normally use coming back down from The Degenerate’s throne room area when exiting the dungeon. Give that a try if you like…