Yes, it's all too common. Try adding more feeders around your yard, and, if possible, out of direct sight of each other.

Oh yes, it happens often. I have five different feeders, and in the beginning when they first start showing up, there is always one bully, however, when the rest start showing up, there are so many that the bully gives up. For the past two years, I have had at least 20 hummers, and they keep coming back. I love to hear them chirp at each other.

For 3 years I had King Tut who owned my back feeder. He would sit on my trellis guarding "his" feeder from dawn to dusk. Even in nasty storms. Sadly he did not return this year. This year I have only seen 1 male at a time and he is very passive. Got some beautiful babies. I added 2 feeders
in my front yard because of King Tut. He did his best to guard them all, but since he couldn't see them from his trellis, the others had time to drink up before he might catch them. I have several hummers, but I really miss his antics.

Pretty common, feisty little devil, isn't he?

I have one that is doing the same thing at my house. There was just him at first then another and now another one. He is geting tired of triying to defend against them and there is some sharing going on but only on a limited basis.
I was hoping that it would get better with time. Maybe it will. I have added another feeder and lots of plants but he does a pretty good job of patroling the yard.