So where I live there's this special credit card given to military personnel who serve more than 3 years which provides 30% discount in a lot of restaurants.

One day me and a couple of friends decided to go dine in this fancy restaurant which we knew is acceping the mentioned card(it said so in the cards website). Upon being seated I asked the waitress whether they accept it, and she replied positively. I almost always do it when I go to new restaurants, there have been misunderstandings in the past. Anyway, after a nice meal, when the bill arrived, I gave the card to one of the waiters to pay for everything and couple of minutes later he returned saying that there has been a technical problem for about five days now and they can't accept the card. He said that they are willing to give me 15% discount instead. It seemed unfair to me so I asked him to call his manager. The owner of the restaurant came and said that he is sorry but they don't accept the card at the moment. My argument was that if we knew that they didn't accept the card we would probably order way less, or go to a different restaurant and that I souldn't pay for their problems. The owner got angry and said that it's not his problem that the credit cards site said that his restaurant accepts the card and I told him that I specifically asked the waitress when we arrived and she said they did. At this point he became super pissed and just shouted to one of the waiters to decrease the 15% difference from the waitresses tips and walked away. When a new bill arrived I told them that I don't want that pay cut on my conscience and I'll take the 15% discount and leave.

I don't think that the waitress sould have paid for that mistake even though she was the one who told us that they accepted the card. I am pretty sure that she was not aware of the issue and that's the owners responsibility to notify the staff of such things. I was so upset at how things turned out and how much of a douche(in my opinion) the owner was that I decided to write a 1-star(out of 5) review on google detailing what happened. About half an hour after I posted the review the owner and a bunch of his friends commented on it calling me a liar, cursing me and telling me to remove it or to never come back again.

My sister said that I shouldn't have posted such a bad review without thinking it through because it can really hurt the business and it's employees. Up until that moment, I thought that that is the reason why google reviews exist, and that what I did was okay, but according to her I was the asshole, so I took the reivew down.

Am I the asshole?