The apartment of my upstairs neighbor is owned by very big realtor company. I complaint to them that upstairs floor is very old, so every single footstep makes very loud squeaky noises. I think it can not be solved by just covering the floor with rugs.

I complaint a lot, but they said it was building problem and 80% of coverage is the best they can do.
I checked my neighbors' apartments in this building, but no aparment unit makes these big noises. Is there any way to make the owner fix the floor?