I apologize ahead of time if this comes off as rude but before you tell someone they are wrong about something, just do a quick internet search to make sure they are actually wrong.
https://www.forbes.com/sites/stevep...e-loss-for-the-2017-fiscal-year/#106b2107f79a
https://www.google.com/amp/s/qz.com...ot-of-money-because-of-the-us-government/amp/
https://www.google.com/amp/s/www.pb...ice-marks-11-straight-years-of-financial-loss
The USPS is part of the federal government so it is very easy to do a quick search to see their financial status/history.
They have lost money every year for the past 12 years running and they have a monopoly on first class mail. They claim that their operating expenses don't require tax dollars but that's just semantics as they have huge retirement expenses that require our tax dollars/deficit spending to meet.
A private enterprise would have been out of business long ago if they operated as poorly as the USPS but since the federal government has an endless supply of tax dollars/deficit spending, they are allowed to stay afloat.
Back when they didn't lose money, their rates were exorbitant and Lysander Spooner started a competing
mail company and was quickly shut down by the feds. Like it or not, your tax dollars and/or progeny's tax dollars are keeping them afloat