What other phones did you have in the past? If you're used to Chinese QC, than I wouldn't be surprised that its 'good enough'.
Are you serious? Chineese QC?, companies like Huawei actually pushed other manufacturers to up their game, especially in the camera department, I've had iPhones, Moto G's, Nokia's, LG, Huawei, Samsung, Sony (never again), Honor and many more, I also setup phones for a lot of people, most recent s20 and OnePlus nord (that felt pretty poor quality), of all the phones I've played around with and/or owned Huawei phones feel very premium, also the cameras have always impressed me on the higher end Huawei phones, even the Mate 10 Pro had a decent camera and impressive dedicated B&W shooter.
Out of interest what do you find is an issue with the camera in the P30?