I think you need to take a deep breath and learn something about car modification. It costs money and takes time to iron out the wrinkles.
There are numerous reasons for the result from tuning, exhaust restriction, intake restriction, boost control, dyno variance and more. Mouthing off about a product isn't helping you at all.
If you work through each of the issues systematically you will achieve the results that the turbo is actually capable of achieving.
With some humility post up ALL the details in a non-emotional way and you will get a lot of help in the forced induction section.
The dyno sheets with AFR's and boost will help diagnose some possible issues straight away.
Too late I see....