Nope, a year old is not 'young'.He chases after them and it doesn't seem to have the finesse of courtship as much as just chasing when they try to get away, but maybe he's still learning... He never waits for them to squat for mating and it looks quite rough. I know young chicken sex is often a little rough, but there's been some blood on their combs, nothing really serious but I don't like it, don't want any cannibalism in my flock. I've also noticed egg production is down quite a bit ever since this started, so not a good sign in my opinion.
Chasing, beyond a brief dash, is not cool.
Not waiting for squat, is not cool.
Bloody combs, is not cool.
Enough stress to suppress egg production, is not cool.
If he's not got what it takes by now, he's not going to get it.