I have a 2018 Hyundai i30, which has done only 2500 km and I am very satisfied with it with the exception of the steering. It seems to have a mind of its own. It slightly pulls either to the left or the right giving a sense of instability. It is worse when travelling at speed on the freeway or when the CVT changes gear. Is this normal for this vehicle? Had I have known this I would not have purchased this vehicle. Surely, not all owners of this model are not having this problem. Have you had other complaints?
Check the tyre pressures and make sure they correctly set, and have the wheel alignment checked.