iOS 10 is the buggiest iOS I have seen so far. youtube starts playing in background when on a call mixing the audio. voicemails keep getting deleted when they r

iOS 10 is the buggiest iOS I have seen so far. youtube starts playing in background when on a call mixing the audio. voicemails keep getting deleted when they reach 20 second mark. the screen freezes very frequently. swiping is confusing delete lock screen notifications and switch on the camera. is it bad product design or bad testing