Made it to Wednesday. I'm about done with this.
Like others said:

• The tasks are boring and are usually missing the punchline like how it was in Postal 2.
  
  
• Game is mostly unfunny Reddit humor. It's like RWS are afraid to offend anyone.
  
  
• Game is hella buggy and not just goofy bugs but also stuff that affect the gameplay negatively. Even after 2 years of patching.
  
  
• The map is too big and too empty. Going from point A to B is boring. Postal 2 made sure the player always bumps into something interesting while on their way to a task. Not really the case here unfortunately.
  
  
• Optimization is still not good.
  

Some might say that the game will eventually be good with patches and RWS are such cool guys because they make stuff for social media or something. I say don't waste your money and time on this. Patches might eventually make it better but at it's core Postal 4 is not a good Postal game and certainly not a good game.

Good to see they've abandoned this project in favour of working on a postal 2 redux which they'll undoubtedly ask a lot of money for.

ONLY BUY IF YOU'RE A DIEHARD POSTAL FAN

This game has been out for a few years not but its literally just a slop game. It hasn't been optimized and still has bugs, the humor is alright yet bland. its nothing compared to postal 2. It killed the soul of postal 2 by making the game's jokes more "family friendly" and avoiding obvious opportunities to make a political joke or a race joke. The map is way too big and empty, it doesnt even feel nor look like a city, and the ai okay at best. some errands are fun but a few can be repetitive. the rampages are fun too but they get repetitive considering there are like 50 of them. its very buggy and likes to crash. overall its a below decent game and underwhelming sequel but its alright enough to be recommended ONLY to diehard fans of this series. its very frustrating though (and terribly optimized). Its that type of game you want to finish for the sole reason of uninstalling it and freeing up some space on your hard drive. Considering how sloppy it is, at least it's the type of game you want to finish at all.