Ok, so I didn't hallucinate the marks that suggest it's not a new bumper. OP I'm curious, how much did you pay for the full bumper paint job (I mean let's be honest if OP paid like 50-100$ then yeah it's no surprise it looks, feels and is complete shit

I used to work at a body shop back in my youth. I don't know about modern paint, but I do know that "back in the day" we would tell customers not to wash their car for at least a week to let the paint "cure".
We painted one guy's Corvette and he took it to a car wash the next day and blew all the new paint off. There were big sheets of red all over the carwash. Out of good faith we repainted the car but it was a really stupid thing to do.