Absolute Maldevelopment

I had bought tacker, but there is pending a roof extension I wanted to make my work easier.
Therefore, I ordered from Amazon Master-Craft MET14 / 16C electronic stapler. The delivery took place on time as usual on Amazon.
The packaging was somewhat sparingly. The tacker came in a real tight box, the device itself also flowed already from the box manufacturer.
Enclosed was a small sample pack with clips and nails and a thick manual.
There is no way to adjust the pressure force available.
From 50 brackets used the rest came only 3 single out only as a 2's or 3-er groups.
This happened in both wet and dry wood, whether pine or oak.

My conclusion: This device is an absolute aberration!