system
Given the following post, respond as if you're commenting on Reddit:
human
[General Horror/Fantasy] Has anyone ever had a purely positive experience with a Lovecraftian monster?

Not a situation where they made a deal, enjoyed some benefit for a certain amount of time, and then paid the price; just a straight-forward, 100% good experience.

Surely not all eldritch abominations view humans with contempt. And I'm not counting the Deep Ones; even though humans have successfully mated with them and their descendants have more-or-less become members of that race, for every 'success' there were a number who didn't live to experience that underwater life due to biological reasons.
gpt
The Yithians (who aren't really *monsters*, but are scary and alien enough by human standards) are generally benevolent towards humanity and get along with us pretty well once we get over the biological and culture shock. The fact that they are literal body snatchers doesn't help either, though they are gracious enough to at least give it back when they are done and let us use their bodies in the time being.

Other than them, there is the pact the citizens of Innsmouth made with Dagon, who effectively saved their town and industry by providing them with gold and bountiful fishing in exchange for mating with his Deep Ones. Not exactly benevolent really but its not like Dagon HAD to fulfill his part of the bargain. Taking what he wanted wouldn't have been difficult. 

But in general, most horrors do hate humanity for one reason or another. Or maybe hate is a strong term. Many view us as cattle, wheat to be reaped at their whim. Or pawns, pieces to be manipulated in some incomprehensible eon-spanning machinations. Maybe even simply a congregation, worshipers to feed some horrible alien ego. Or even less than that, they regard us as insects, below their notice. We don't care about ants until we step on one, and we don't regard them until they bite us. And then we proceed to exterminate the whole hive. Such are they with humans.