Bro, one of my friends who bought it said that camera has improved a lot after software update, so please try it once after updating.
You can also try the google camera app for camera, download from here. Google Camera APKs - APKMirror Fun fact: You can also record 4k videos using google camera app because hardware supports it!! (don't know why xiaomi disabled it in their app though)!!
And after doing these, please share the results if you don't mind, will you?