Most of all, you have to realise that roosters are not like hens. It seems obvious but............
I’ve picked up and carried and been particularly friendly to a number of cockerels. There are always problems later but once you understand a bit about what drives the cockerel and how the cockerel is likely to see you as it matures how to handle the problems later becomes more straightforward.
If you feed and pet a cockerel he’s going to imprint on you. What’s more, he’s going to see you as a strange mix between top hen and something else he doesn’t quite understand. As soon as the cockerel is able to mate, particularly if you have a more senior rooster who mates with the hens, the cockerel is going to see you as the only mating opportunity he has.
He may well do the ‘you’re my hen’ dance around you. He may drop food for you. He’s likely to peck you to both boss you about and in part as a sign of affection. Most of all, he’s likely to try and mate with you, probably your feet. This really upsets some people and they seem to think this is either aggressive behavior, or find it distasteful. Frankly it doesn’t bother me. I’ve got a young cockerel here now in love with my boots. It takes time, but eventually they grow out of this stage and dump you and turn their charm on for the hens.
If you drive a cockerel that behaves like this away from you, this can make him aggressive and want to dominated you. This seems often to be where things go wrong for many people.
You need to remember it’s not his fault. You, by trying to be his mum, feeding him and grooming him etc, have made the situation. Most cockerels try to mate with their mothers first and later learn how to attract their own hens.
My advice is wear boots. Let him do what he needs to with the boots and if you don’t already have hens get some.