Had my first (probably) intoxicated and irate customer today (USA)

Ok so as I’m writing this it’s technically the next day (1:51 AM) but yeah. So technically yesterday I was sheduled to work 5 PM-midnight. So I went in as normal. Right at 8 o clock, I went on break. I had been on counter prior to going on break, and that’s like handling inside/takeout/delivery orders. So while I was on break someone else took that spot. Right around 8:30 I got back from break, and went to my spot as normal. There was only I think 2 orders on my screen at that time, a DoorDash and a takeout. Maybe there were 2 DoorDashes, I can’t remember. So I worked on those as normal, and it looked like the person that had that spot while I was on break was kind of working slow. Like the orders had maybe been there a while, but I don’t know. So the doordashes were no problem. I got those set up and gave them to the dashers, and no problems there. Then I see the takeout order and it was already partially completed by the person that was at my spot while I was on break. And I heard the guy that ordered it say “I’ve been waiting for 30 minutes” and he was in the lobby. He wasn’t talking to me or anything at that point. So I worked on it and got it done. Handed it out, and he was in the lobby and he said “You get these young bucks out here and they don’t know what the fuck they’re doing” or something like that. It was along those lines. And he was right in front of the front register when he said that, and he was walking away I think. And I looked right at him and I said “What was that?” And he turned around and looked at me. Then after a couple seconds I said “Well I think I’ll get back to work.” Then he left I think. I heard him say “they got my fuckin order wrong too” once also. Which I don’t think I did. I put what was on the ticket in the fuckin bag so not sure how that’s wrong. Anyway, one of my coworkers was on break and in the lobby, and he saw all of this happen. He came back into the kitchen where I was and he motioned me to come here. So I did. And he talked to me and he said I shouldn’t do that or have done that, basically. He said that the guy was irate and probably intoxicated. He said I could get a write up for stuff like this. And he also told me to just let the guy speak cause he can say what he wants or whatever. And I’m not trying to flex height or anything, but I’m 6’3 and had at least like 2-3 inches over the guy this happened with. So yeah uh that’s the first time something like that’s ever happened to me working.