Rattling noises in my Cx-30

A couple of weeks after purchase, my Cx-30 started making rattling noises. At first it was both front doors however now it makes noises from the sun roof and instrument cluster too. I have taken it into my Mazda dealer 6 times to fix these noises and each time the noises come back. For example there was a module loose behind the door card which the dealer repaired multiple times only for it to return after a couple of days. My question is are these noises to be expected because my dealer believes because these cars are 90% plastic inside, the noises won’t ever stop. Coming from a e class coupe which was basically silent inside, these noises are driving me insane however I don’t know if I’m just being sensitive or if I am in the right. Any help or advice would be appreciated!