I've heard you on this before & not arguing because I am sure you are right but nearly everyone here has mixed flocks without things getting as extreme as @BY Bob is experiencing. Some of us have some very odd looking hens indeed. I'm wondering what has made his situation so extreme? I have Lavender, who is definitely the oddest looking hen I own & an absolute klutz to boot but it will never be Lavender being bullied. She is also a single. My Aracaunas, my other really odd lookers, are a pair who don't hang together, even to roost, but are pretty well tolerated by everyone else. Granted While everyone is still able to hop their fence they are pretty much free ranging @ will so have plenty of space.I'm not surprised. Very sad. One partial solution is to get another to keep her company. I don't think this problem is going to go away. I beleive I said as much when you first got her.
Watching your videos of roosting just left me feeling very sorry for her.
Unpopular though it is here on BYC the view of the old school chicken keepers here is don't mix breeds.
After years and made much worse by Gedit her half sister dying Myth has a very hard life with the mixed breeds. Myth is mostly bantam. The Bantam roosters know it and are constantly pestering her to leave Notch. She could probably swing it with the other bantam hens now that Bluespot is dead but Tribe 3 is her home now, rough, or not.
I've mentioned before, she's not an easy hen to like but I wish I could do something for her. She doesn't get hurt, but she is constantly harrassed by Knock and to a cetain extent by Donk as well. If the tribes here were all confined together her life would be a complete misery.
Family and/or breed, that's how chickens are and so are many other creatures to a greater or lesser extent including humans.
As I've said before I was hopping to gradually move my flock to just a couple of different breeds but I am having so much trouble acquiring my breeds of choice I'm likely to continue to have a pretty mixed flock so managing that well becomes a priority & I am very curious to know how everyone gets their flock to get along without dramas.