Are they neutered? Unneutered rabbits can be more territorial, which is perhaps when you are being bitten/scratched. Also, as you have unbonded rabbits in the same room I assume they are caged? You dont 'invade' their space and go to stroke them do you, as this could make them nervous, their cage should be their personal space that they arent bothered in. Some rabbits get very funny about 'their' space.
I also found that my nervy bun Annabella grows in confidence around me when she is free-range 24/7, I imagine as she's around me all the time even when I'm asleep (theyre in my bedroom) and as then the room is her cage as such, that she feels more confident in it.
You're not a bad bunny mum, rabbits are prey animals and will act as such. I have only ever met one rabbit that actually liked being picked up, it is really unusual. Most rabbits that allow themselves to be picked up are just tolerating it. But you can do things to make them more interested in you. You can hand-feed all pellets/treats/veg and talk to them whilst you are doing it. Talk to them a lot, interact with them. Also, if you are doing things they dislike like stroking them, if you can reduce that you will gain their trust easier.
Annabelle doesnt much like humans, and would run from me all the time. I stopped trying to get her to accept being touched, if she didnt like it there is no point, and she slowly grew to learn that I could be trusted not to touch her. She learnt to trust me and would come over to say hi and see if I had food then. 10 months down the line and I can give her noserubs now occasionally and she seems to sort of like them, but it took a lot to get to that point. Its really annoying as she is a lionhead and I'd love to brush her as she gets matts
but I have to settle for regularly sneakily checking to make sure she doesnt have them whilst giving her a stroke, and cutting/brushing them out when she gets a knot. Its not ideal but she doesnt like being touched so less stressful this way.
She acts like she hates me, yes, and she wont even go near me today after I took her to the vets earlier, but I know she likes me a bit, because when someone visits they think I only have one rabbit - Annabelle is nowhere to be seen! She hides as soon as anyone else walks in the room, sometimes just when she hears them coming, and yet she stays out around me, so I know she must like me a little. She mainly likes me when I have food :lol: