Frustrating

This Starbucks is so inadequate and lack competent staffs. I went in to get a gift care for my friend's birthday and I watched one cashier taking 5 minutes just to scan one bag of coffee. The two cashiers were busy fixing their mistakes and another customers was also frustrated because one of the two cashiers was very confusing and extremely slow and messed up his giftcards. I waited in line for my turn and when it was my turn, I asked her for a specific amount of 30$ towards the giftcard. She had to ask me twice after i told her the exact amount. I feel like the staff was very inadequate and incompetent as it was not busy AT ALL and they still took a longer than average time to process my order, which was only a giftcard. If it was any busier, their speed would slow down business and people, like me, would actually just walk away and leave and go to another coffee shop. Even after processing my gifcard, the cashier did not immediately give me an envelope for it and I had to ask. Please be more professional. THe most frustrating part is I was so patient and at the end they ran out of gift card envelopes... that shows poor inventory control. They said somebody had previously purchase 20 giftcards and that is why they ran out of envelope. Really?! the Whole store only had 20 envelopes. Whoever is doing the inventory ,or should be, really should just go back to school and learn how to do it properly. They did not offer any other type of resolution and I had to leave and walk away to another Starbucks shop asking for an envelope as it is a birthday giftcard and it looks horrible without an envelope. Whoever is in charge there should really get their act together and train their employees to be more professional, have better control of inventory, be speedy and learn how to actually use the cashier machines. Any other Starbucks I have been to is better than this one, this one particular store is just annoying.