i might be the asshole

so i work at this dive bar on main st and one night last week a couple comes in. they are clearly new here, first timers, kinda awkward as they look around not really knowing what to do or where to go. anyways, there was some big college game on so the place is kind of packed already, super busy even before this couple shows up. i am juggling everything and trying to keep everyone happy but i can just tell these two are lost in a sea of regulars and sports fans. the wife wants a really specific drink, something exotic sounding with like seventeen ingredients that i have never heard of or seen written down anywhere. i try my best and give her what i think she might be asking for but she looks so disappointed. like she is thinking i messed it up on purpose, you know? and the husband just keeps staring at me, not really saying anything but his eyes are everywhere. the wife says something about trying somewhere else next time and they start to leave but not before the husband gives me a weird look that feels kinda accusatory. now its been days since then but i keep thinking maybe i was too short with them or if i should have just said sorry for the mixup. it has bugged me ever since, wondering if i am the asshole here or if they were just having a bad day and taking it out on me.