Rude Boss

Hi, So I’m at work and my boss had a video call. The way it’s set-up is when you’re sitting at your desk you click on the link and the video begins, much like a zoom call. My boss is technologically challenged and said he didn’t know what to do. I opened the call and the person on the other end had already joined. The volume was a little low so I was looking for the volume button to raise it. At that point he abruptly hung up the call and said that I was wasting his time and to go get IT. I was a bit stunned. I’m really considering leaving. I know it’s my thoughts about his actions, but I really felt like his reaction was unnecessary and uncalled for. Help please!