Is OTHER wrong in the post ? POST : Let's say friend who did wrong was A. And other friend was B.

It was B's b-day party and all they wanted to do was play board games and watch a movie. We were at a place where they didn't sell alcohol and A with another person said they're going for a smoke. We waited, with the game ready to play for 40 mins. We later on found out that A in fact went to a bar to get drinks.

Later on A also left the party to get food, again, taking some more people with them, while B and I and few others were ready to play games. At this point we decided to play games anyway. A was basically not there 80% of the time.

Few days later i talked to A because this was not like them at all. I told them it was a shitty thing to do to a friend. 

A said "yeah but I had stuff going on, you know. I wanted to get drunk to forget. I didn't want to be there anyway." 

I told A that personal problems are not an excuse to treat your friend like s@!t. That they should own up to their mistake. I really didn't like how they made the issue about themselves, again. Getting defensive and bringing their own problems forward, as an excuse for bad behaviour.

A then said something along the lines of "this is not your problem, it's between me and B. I apologized to them anyway and we're good. Why the f@#k do you care. Stop putting salt on my wounds. Leave me alone."

I genuinely just wanted to see some sort of remorse for what A did because I didn't want to believe they would care so little about their friend. Because maybe one day I'll be treated the same.

Am I the a-hole here for criticizing A? Especially because A was not going through the best time in their life at the time.
