My question:Is it possible to get a normal job with D-06 Working visa?
Yes If you find an employer who is willing to go through the arduous process of obtaining a work permit to hire you. However, it is extremely unlikely that they will go through the trouble of doing so for someone at the intern/entry level.
What can I do if employers do not want to get a "work permit" for me?
Nothing at all in Poland. Return to your country of origin and start all over again.