For the last couple of years (after Arab Spring and IS), getting s Schengen visa got much harder for those who are Turkish. Last year, I applied for a tourist visa for Germany and was shocked when I got only a single entry, valid for 7 days but with a 3-days maximum visit. The scrutiny at the airport with that visa was excruciating, to say the least.
Now I would like a multiple-entry visa with a validity of 60-90 days, so that I can go to open air festivals in the summer.
I can't make a clear case to the Consulate because all tourist applications go through an intermediate agency, iData. You send the required standard documents, but it discards anything else you submit. You can't even submit multiple round-trip flight reservations that are one month apart as documentation (e.g., 1st to 10th June AND 15th to 20th July).
How can I overcome these obstacles?