Terrible Visa services.
Your mistake is in thinking that you have a legal right to a visa, and that Poland has some kind of obligation to respect that right. In reality, Poland has no obligation whatsoever to issue you a visa, for whatever reason of the consul's choosing, with no explanation required in cases of refusal.
Since you have no legal rights, you have no basis to make a complaint or pursue legal action. The fact that you are unhappy with the treatment you received at the embassy is solely your problem. No one else cares, nor should they.
The rest of your rant sounds like sour grapes, and your letter is laughable.