I"m going to be pretty plain spoken here, cause there's a little one involved.
I don't think it's your set up. I think it's your behavior and tolerance of the rooster's behavior.
You state he doesn't get out of your way when you move through the coop. that's the cardinal rule here---the lesser always give way to the dominant. I'm the dominant, I'm the human. Every animal on this place moves a step or two out of the way when i walk toward them.
Watch your birds. You'll see the dominant animal move through the flock, the others move out of her way. No fuss or drama, they're not terrified of her, she's not pecking or beating on them. It's a simple fact of life, you yield to the uppers.
I'd have a few training sessions with the rooster and see how it goes. Use a tool, like a handle/stick/etc. Something to make your arm longer and give you more reach. Feet work also, but trying to boot a rooster can put one off balance and that can end poorly
. Start walking toward him, but focus past him. You're going to walk
through him, not
to him. If he does not yield by the time you can reach him with your tool, swat/push him out of the way. He's not too dumb, trust me. Get him out of your way, but he has to move some himself, not just you pushing him. And continue your walk to where you were going. Wait a few minutes, repeat.
Hopefully, he starts giving way as you approach. that's the idea.
If he refuses to yield to you, you've got to get more forceful. I don't know if you've ever seen one of your birds go after another bird, but there's a lot of posturing and noise involved. I go that route, along with some physical interaction. If my young cockerels won't move for me, or act the tiniest bit aggressive,
I make them think they're going to die. I become a crazy psycho woman. I yell, I stomp at them, I wave my arms, I might boot them or swat them if I have a tool handy, I chase them away----
-for about 10 seconds . Usually he hops into the air in alarm and takes off. I don't chase them down at that point. No reason, he did what I wanted. Lesson learned. I'll let him think on that for a while, but I'll be sure to re-approach him within say half an hour, to see how he reacts. Yes, some need more training than others, but pretty much all can learn.
It's not enough for him simply not to attack me. He's got to show submissive behavior, that of moving out of my way. No dropping a wing at me, no courting behavior--he has plenty of hens for that.
I've been doing this so long and it's so instinctive, it's kind of hard to type out instructions
. So, let me know if something isn't clear. I'm only on my first Diet Coke, ya know, the brain might not be fully functional yet.
And all that said.......littles and roosters often just don't mix. Littles are noisy, unpredictable, they move fast and oddly, and they seem to make roosters nervous. Nervous birds tend to attack. Even once you're comfortable with your bird's behavior toward you, you'll still basically have to have eyes on her the entire time she's around him, and I would be within arm's reach of her at all times. We like to think of our birds as pets, but the truth is a rooster is intact male livestock, same as a buck goat, boar hog, bull, etc. Just a smaller package, but every bit as hormone-fueled.
I wish you the best with your birds. Let us know how things go.