Drill bits are the problem

The drill bits of wood borers are unfortunately hard to use. From the smallest two drills are canceled after only a few days and the top of the largest drill was delivered already canceled. The head of the second largest drill was already bent upon delivery.
The Fräsbohrern I can not say anything that I have not yet used.
On the positive side, the drill due to the construction in the drill can not spin and so the chuck can not break anything.