Most breeds get less skittish as they age and understand both that you are the one that brings treats and that you aren't going to eat them.
I never found wyandottes to be more skittish than other breeds. But I did keep them with a variety of breeds and many were Mediterranean breeds that tend to be skittish.
Everyone is different. For me, they're livestock rather than pets. I love animals but never longed for a cuddly chicken.
I now raise exclusively Black Penedesencas and they are calm after about a year and if free ranging but they won't let you touch them. If they're confined and you try to occupy their space, they try to burst through walls to get away.
Their wariness and aloofness makes for both predator proof chickens and roosters that don't attack humans.
I turn all the flocks out in the morning and they all return to roost for locking up and I never hover over them but they're all there at the end of the day.