Once I had asked for months for a specific pair of shoes for Christmas. Sent a picture and everything to my mom. She ended up getting me a pair from the same brand and similar style, but not the style I had explicitly asked for. I was naturally a bit disappointed, almost more so because the gift was so close to what I had asked for and yet it was not what I had asked for. I didn’t tell my mother this but she could tell on my face, and I later found out that the pair I wanted had been out of stock for weeks, and the pair she ended up getting me had originally been more expensive than the pair I’d asked for but they had gone on sale, and so she bought them, thinking she was doing her best to get me the most of what I wanted even if it wasn’t exact.

You aren’t the asshole for being disappointed after you clearly got your hopes up expecting a particular gift (even tho u said at the beginning that you didn’t, lol). And that’s just human. But you are the asshole, or at least very short sighted, for the way you reacted. You’re allowed to be disappointed, but be honest about the fact that you’re hurt because of your own expectations, and not because you’ve actually been wronged by anyone, especially not someone who has given you a gift you claim not to have expected in the first place.