Most of my boys get managed between the ages of 3 months up to a year and a half. Young roosters often need to be pulled. Occasionally I get a nice one who doesn't need any intervention from me, but that is rare.
Their surging hormones makes them crazy sometimes. I find it easier to remove them the minute I see them making trouble and they get penned up, many times for months. I don't tolerate bad behaviors, I get out my fishing net and those boys get caught, which also works to dominate them too.
They go into a decent sized pen and there they stay. 8-12 months is a good age to try to let them out to see how their behavior has progressed. Usually it's in the middle of winter when they are calmer and don't have as much spare energy or the urge to mate.
You don't have older roosters yet, which can help correct that behavior. My roosters come running from everywhere when a hen screams. Young roosters get put in their place. So I have assistance raising the boys. It can require some extra messing around to get them there but they do end up being assets.
So you have to decide if you have the extra space and patience to follow through with the boys. All my current mature roosters are keeper, and I've had plenty more before these that were equally as nice. I raise them similar as I raise my dogs, it's a process that requires corrections along the way, and you aren't done until they mature, than they usually are a joy to have around.