Door hinge wear, needs replacing but why?

[Geddyboy]

We had our house internal doors replaced approximately 8 years ago with veneered doors, each having three ZOO ball bearing hinges, top, middle and bottom.
On a few of the doors, the top hinge has worn on several occasions, with the hinge having excess play, causing the door to lean and catch on the frame. Movement is evident in the hinge pushing the door at the top
I have replaced the worn/slack top hinge and all is well for a period of time. It's happening again on one door and wonder if there's any point in replacing with the same brand or trying to find a better brand or a reason as to why they keep sagging.
All help gratefully appreciated.

 

[Wayners]

I've also been disappointed in hinges getting worn out quickly..
Other than wedging door to keep stable and swapping hinges. Also lubricant ever 6 months with silicone spray helps. I don't know what the answer is