> honestly wish they would go private.
Problem with this statement here is that you're basically saying you'd be willing to give up one of your constitutional rights and services. I take much harder stance. I refuse to give up even one single right. Regardless of how miniscule it is. Does the post office need modernization? Absolutely. Does the post office need to change the way they do mail delivery? Absolutely. Am I willing to give it up? Absolutely not. If someone is willing to give up one right, then they're okay with giving up other rights.
The major problem with the modern post office is the dei crap. When covid hit they quit giving drug tests or background checks. The general public doesn't know this.
It's not a right, it's a power granted to congress. The constitution doesn't guarantee postal service to anyone.
Article I, Section 8, Clause 7 grants congress the power to establish a post office and postal roads. It's interpreted as being implied that it grants this post office the right to carry and deliver mail, as well as define where those offices are and the routes they must follow. This doesn't require congress to do it, it merely grants them that power. Congress could essentially end their use of that power at any time, as there's nothing preventing them from doing so.
They could just as easily establish a postal service and define those services for a private company - which is essentially what the post office is now. It's a private company that isn't allowed to define it's own practices, they have to petition congress for them. Or, they could simply say "Anyone that wants to carry mail can do so, WDGAF anymore."