Has deep flaws left in my luggage carrier

So initially the positive:
+ I personally find the support mechanism is ingenious: simply pull the handle and you're the bag from
+ Videos I paid just 73 EUR, the price I could not find anywhere else
+ Inside pockets: Both bags have two inside pockets, one with each network
+ Third belt: Some other pockets have only the fixings right and left, while these bags also have a strap in the middle: Practical!

However:
- After ~ 150 km, the pockets deep notches have beaten in my Racktime carriers that go down to the metal. That should not be!