If your local store isn't following Costco's policies, that's not Costco's fault. Report them if you really want.
A membership is absolutely not required to use the "food court". The machine doesn't scan or use your membership at all. The rest of your complaints are equally bold faced lies that don't in any way match Costco's policy, or full on unhinged lunatic horseshit.
Yeah, discord is way less bad than anything else I've seen. Tags would be cool but you can change settings per channel and server and as the host you can give people more granular control by using roles.
I don't really know what more you would reasonably want.
"Slavery's illegal... unless we want you for jury duty." is definitely some horseshit. My job will pay for like a week, but the fact that it's entirely possible to be called for longer and have the state pay you fuckall is ridiculous.