Holy moly I'm kinda pissed.
So for anyone else stuck on the 2nd/2 star bounty Monty, once you get to Morris Hill, go north, then climb up the vines to progress.
That is some trashcan fire game design to put a bunch of broken ladders which you can't climb and vines that you can.
Broken ladders tell the player - "Hey you can't climb up here yet, find a way to repair the ladder" or "Find another way up".
I thought the trees to left were suspiciously thin, so that I had to find an axe or some shit to progress.