ProRetina 13" mod.1829€ works REALLY slow

This mac:

http://store.apple.com/it/buy-mac/macbook-pro?product=ME866T/A&step=config

How can be that my mac of 1829 Euro is sobad?

I bought about 18 days ago, I needed it because I had to move in other country to work.

I Bought not entry, not middle, but one of top level of 13"

13" con display Retina: 2,6GHz

Specifiche

• Intel Core i5 dual-core a 2,6GHz
• Turbo Boost fino a 3,1GHz
• 8GB di memoria a 1600MHz
• Unità flash PCIe da 512GB¹
• Intel Iris Graphics

It works as the wroste laptop I ever had.

With InDesign I 'm usually using almost all the Ram, It start to be slower.

With Finalcutpro X you cannot open nothing.

With Imovie it works but really slowly.

no word to say to open a game!

I had a Vaio 6 years ago, I payed 1200E about and it was fast like ****!

How can be possible I had bought this really bad laptop?

Any ideas?

Is only me or anybody else?