Idk what happened but from some time when I updated my phone to letest update camera had been degraded. I can easily see a lot of difference between old photo quality and now the quality doesn't match it at all . And optimization not that good even, as I can see people with low specs camera of iQOO older model Phones are getting better photo shots. But even after having better specs and better chip and paying more for it doesn't match them at all . Please look at my phone model IQOO Z9s with its optimizations . 
I hope with the next update iQOO team resolved this issues.