I guess when wages don't add up to a viable life, resentment and carelessness spread like wildfire.
The only thing I've been able to surmise is that they probably pay the managers very well and mostly just hire smart high schoolers that may have been passed over or didn't know about internship opportunities, and pay slightly better rates than McDonald's. They still pull the same scummy things as McDonald's with pressuring employees for goals that only benefit the manager, but maybe its not so bad if you're getting paid more than your very young peers.
Chick-Fil-A would probably try to attribute some religious meaning to the Sunday off for their adult workers, but it seems like any company could just guarantee a day off on the weekend for their workers.
Given how much of that tribalism is also explicitly religiously coded, I find it's hard not to want to apply harsher words like "cult-like" to Chik-Fil-A, specifically, but "sect-like" is probably more accurate given how predominant both their business culture tribe and religious tribe are in American politics today even if "sect-like" doesn't have quite the same harsh connotations designed to help you question the systems of power in place.
Chick-fil-A corporate donates and supports some gross organizations, but none of what you said makes sense for the stores I've been to in various parts of the country