I (f19) work at a trampoline park with another guy my age (m19). We’ll call him Daniel. For backstory, Daniel and I don’t get along at all, mostly on my side. I don’t like being around him at all. I was closing one night, and I was cleaning both bathrooms. The park was empty, and I had already cleaned the girls bathroom. I had closed the boy’s bathroom down with a big sign so that nobody would try to use it while I was cleaning it. You’d have to duck underneath it to get in. Our boys bathroom only has two stalls and two urinals. The urinals have no dividers. As I was cleaning the big stall, I hear the door open, and I come out to make it known that I was in there. It was Daniel. I asked what he was doing, he said “I have to pee,” as he headed towards the urinal. I told him no, and to get out, and he refused. We had that exchange about three times before he pulls it out and starts to go in front of me. I reported him to our general manager the next morning, and he’s making it out to seem like I was overreacting to all of our coworkers, a few of them have told me. I don’t feel comfortable being around him anymore, but one of my managers is also telling me that she wouldn’t have seen it as that big of a deal. AITAH?

Edit: to clear up previous confusion. 1) I did not stay in the bathroom afterwards. 2) I did not stand and argue with him about it, he was already doing it when the exchange took place. 3) I was cleaning the big stall. I came out of it to see who opened the door. 4) he was already pulling it out when I told him no, not in reference to him not being allowed to use the bathroom. In reference to him pulling his dick out while I’m standing right in front of him. 5) there was another bathroom available.