Most chickens do not like to be touched. I raised my birds from egg and held them for hours every day as chicks, but they behave the same as yours now. Being able to hand feed them seems to be as good as it gets for most standard breeds. My sister has some Golden Comets that don't even squack when you pick them up, although they still prefer not to be touched.
X2
I've had the same experience....a
very few will allow me to pick them up, they seem
want to be picked up...but even that comes and goes, from chickhood to adulthood.
If I need to handle a bird to inspect it during the day(at night in the dark they are much easier to pick up off the roost),
I have to corner it and grab it and they scream bloody hell.
Once you get the wings held down and keep their feet from gaining purchase on anything they will at least submit.
Hold one hand under the bird capturing one wing hold the other wing against your body, then pet their head and neck, talking softly to them.
Most important is
be calm yourself, if they can feel your fear/anxiety and will react with fear/anxiety.
Hold them until they calm down and submit then gently holding those wings slowly lower them to the ground,
once their feet touch the ground hold them gently in place until they again calm if possible, then release them.
That's the goal, might not happen right away, but keep trying if you want.
I have some broody chicks, never really handled them much and they won't feed form my hand, won't even come near me at 18 weeks.
I had to catch one to change out her leg band and she was
not happy, but submitted to laying on her back while I change the band.
Afterwards she was a
little less skittish because she had survived that terrible fate of being in human hands and now will take feed from the scoop,
and her sisters will too. Next step feeding form hand. It takes a lot of time and calm patience.