Just because something is easier does not make it the right decision. He might not 'improve', that might just be his personality. He probably does not understand why he should have to like people.
Think of it from a chicken's point of view: some strange person tells me when I can go out of the pen, picks up my hens, and controls the food. He/She thinks they can just walk in and mess with my family and tell me what to do?
If you look at it that way, the rooster is protecting his family whether the person is bigger than him are not. That is brave. Most people may not see it as bravery and strength, but it really is. Often times "nice" roosters are either afraid of the person, or they just do not feel as protective of their hens. Just show him that you are stronger and he might not think it worth it anymore to attack you. But, the fact that he has the courage to try is beneficial when it comes to protecting the hens from predators. That is a good rooster that acts more like a true jungle chicken than a "nice" rooster.
Think of it from a chicken's point of view: some strange person tells me when I can go out of the pen, picks up my hens, and controls the food. He/She thinks they can just walk in and mess with my family and tell me what to do?
If you look at it that way, the rooster is protecting his family whether the person is bigger than him are not. That is brave. Most people may not see it as bravery and strength, but it really is. Often times "nice" roosters are either afraid of the person, or they just do not feel as protective of their hens. Just show him that you are stronger and he might not think it worth it anymore to attack you. But, the fact that he has the courage to try is beneficial when it comes to protecting the hens from predators. That is a good rooster that acts more like a true jungle chicken than a "nice" rooster.