Chickens have different personalities and tolerance levels just like people....except...they aren't people, they are animals driven by deeply imbedded instincts. May I encourage you to adhere to the advice given above and accept they don't hate you they fear you...and not you really....just ANYthing unexpected in their environment. Totally different concept.
Chickens eat, drink, scratch, poop, lay. They have very little understanding of our world. What they do understand is their internal instincts which means run away at the first sign of any unexpected movement as it poses danger. Some birds are simply flightier than others. Some breeds are flightier than others. You've chosen (may I presume feed store) breeds that have been bred for egg color and production NOT temperament. (You also lucked out with the RIRs....which are not generally known for friendlieness).
You can continue to do what you are doing with this batch to help them remain calm. I do believe they will improve in time as they lose some of their skittishness that is natural to little chick survival. The treat bucket is the way to their little greedy hearts. I'm sure in time they will be happy to run to you freely at the shake of the treat bucket. That is likely the best their little avarice hearts can muster.
Or you can turn to breeder quality birds with breeds that are known to be extremely docile: Bantam Cochins are very sweet, Salmon Favorelles too, many Silkies (though good broody girls can be quite snotty when they are on the nest).
Also, you may wish to handle the small chicks a bit less when you get a new batch. There is a balance to interacting and over acting to the point of causing distress in the young chick. Running to you for the treat to work up to taking it from your hand is the most you may get from them comfortably. Avoid picking up and handling which can cause huge fear and stress. In time, those who are comfortable will hop up onto a knee for more attention. Then you can know that is appropriate for that bird.
But remember, chickens are not like kittens or dogs. Most simply are not lap pets. Some may become quite charming, but most are perfectly content scratching, pecking, laying about in the sun, and being chickens.
My thoughts
LofMc