First off, I would highly recommend going back to feeding her in your enclosure. She isn't seeing your hand as food, they can smell and sense the heat quite well. Even if your hand does smell like a mouse and they strike, they wouldnt be wanting to continue to eat it after. Moving the snake to a different enclosure just causes more stress, can make feeding harder, and can actually cause her to strike MORE, if out of defense.
Secondly, with your handling problem. Handling snakes takes trust between both you and your animal. If one doesn't trust the other, then it isnt going to work. You've already been through the worst, you got tagged, but when you think about it, thats the worst it can get. Honestly, I believe that if you're actually afraid to go near your animal, you shouldn't be keeping it in the first place. I don't mean this in any harsh terms, but truly, I do believe that in this you will need to work with the snake slowly to help both you and her get used to the situation. Who knows, you may get tagged a few times, but it'll be worth it in the end for easy handling for the next 20+ Years.
As for her shed, could you explain "a little messed up"? Whats her humidity? The bad shed could also be caused by what seems like the large amount of stress that you may have been putting on her. Is she dehydrated?
The way she reacts to that snake hook worries me. Did you hooktrain her? If she's holding on for dear life, she obviously thinks that its a threat, and its no wonder why shes so unwilling to move. "Used to fit inside it" also worries me, is she just not able to even go inside said hide anymore? If you want to look for new ones,
reptile basics has plenty of different choices here.
Lastly...mice? At 3 feet long? How many of what size are you feeding her? Could we get a weight of both the snake and the mice provided? I usually recommend people go for rats, its much easier to feed a single, large meal then many small ones, and i've heard they are much better for the snakes as well.
I hope I didn't come off as too harsh in this post, but I feel that you left a lot of questions unanswered, as well as have been practicing a decent amount of things that many others do not agree with. Hopefully, some others can help shed some light on this as well, and if you can help by answering those above questions, i'd be more than willing to help you out more as well!
Small Edit: Agree with aerries, the size of her enclosure and such would be helpful as well.