Almost none of Chinese movie did good outside of China. So it's not new. It's bad but it should be very entertaining. If not, it could be like Buddies in India.
If you are not a fan of any cast, I doubt no one wants to watch Chinese movie. Jackie Chan is still the most well-known Chinese actor outside of China. I doubt fan will care much about the rating. Good or bad, his scene still makes everyone laugh tbh.
Just forget how bad it is, let just talking about its box office performance. Most of your comments sound so negative toward KFY tbh. The film is not the only bad CNY released, even the record-breaking JTTW2 didn't have good rating too.