Back when I was a kid in the 50’s, a car lasted about 100k miles, and it was not unusual to have to replace at least the front wheel bearings once in the life of the car.
These days, when you hear about someone replacing any wheel bearing, the car probably has 200k or better on it. I replaced all four wheel bearings on my '91 Volvo by the time it hit 250k miles.
Your experience is unusual. Something about that car is not right. Do the bearings look like they have been unusually hot, such that the grease was destroyed?