No, stopping all USPS deliveries is not an option. They can usually hold mail for up to 30 days if you apply for it, but I think this even varies by local office.
You can, however, refuse some mail. This is a manual process. You can also apply to be removed from mailing lists, which is almost certainly what the other poster did.
acchariya@lemmy.world 21 hours ago
You just have to move to a place where the post office is a disaster and you won’t get mail anymore. Northern new Mexico, for one.