At least Depths of Yoth has a defined endpoint. Sure, you're running around in circles and doing a lot of the same things again, but you're also racing against a clock, so you've got a reason to keep going. That really shouldn't be an upside, since every scenario is supposed to be a race against the clock, but Heart of the Elders (Part I) can literally end with no change whatsoever in the state of the campaign. The ideal strategy in Heart of the Elders is just to resign whenever things look the least bit hairy and wait for a decent run of luck to slowly chip away at the pillars.
(Also, Heart of the Elders (Part I) is just The Untamed Wilds. Exact same mechanics, with one Location and less than half the Mythos deck swapped out. I like this campaign more than most, but even I'm never going to defend this scenario.)