I drove maybe 100km with those wheels. They are my first wheels and they came with the shoes. 84mm. I didn’t do anything crazy with them. I didn’t often T-break, I just drove with them. How long should they last?
What kind of surface do you usually skate on? Maybe your streets are more on the rougher side?
Also, the hardness of the wheels might not be optimal for durability.
When you decide to get new wheels you might check out this video first, it also talks about rotating the wheels (which, I suppose, is the same as twisting them?).