Only stayed in Los Angeles for three days, just explored the surroundings

Everything else was great, with large vehicles for pick-up and drop-off, and the service was excellent! However, when we returned the car, we discovered that our child's safety seat had not been secured for the entire duration. When we picked up the car, they said they would install the safety seat for us, so we assumed it was done. But during the return, we realized it was just placed on the seat without being secured. We didn't double-check, but luckily the trip was safe.