I went to this place half year ago and I was blown...

I went to this place half year ago and I was blown away by the food and service. The staff were so friendly and happy. So this time when I am back to Oahu, it's a no-brainer that I had to come to this place again . However, it was an disappointing experience this time. The guy who was taking care of our table was very rude. It looked like we owe him 1million dollars. No smile, no conversation, and even no "hi". He literally grabbed the menu from my hands when he took our order, and later literally threw our food on the table and stormed away. Never asked us whether we need more water or coffee. The quality of food also degrades.
Overall, this place was on my "must go" list before, and now it's just a mediocre cafe.