Haha. "I don't have a place to return to, where to sleep, or even anything to eat, but I'm going to pretend I don't trust you while taking your food and living in your house."
I get that him saving the demon queen earned him some gratitude, but maybe they could consider he was also the reason she needed to be saved in the first place? Is there a need to give him power now that he lost his magic and is thus just a regular person? Aren't there other demons or people who aren't ambivalent that have also been loyal to the queen and could benefit from the magic? Like I get that he's the MC, but the author is just giving him things "because he is the MC" instead of him being the MC because he acts in ways that makes him interesting. How considerate of the plot to introduce a difficulty, then have someone provide both the solution to that problem without him making any effort, and also the solution involving sex with a hot girl. He's not even saying he'll use the power to help them, just so satisfy his own curiosity as to why he was betrayed (hint: it's because you are an idiot and your usefulness was at an end).