Yes, a photo of the Rock would help. Show a close-up of the head so we can see comb and wattles. Also a full-body shot showing legs, tail, and posture can help a lot.
Is it always a disaster if you don’t have that magic ratio of 10 to 1? Not at all. Lots of people have flocks with a lot fewer or a lot more hens than that “perfect” ratio and don’t have the problems people say you will. Plenty of people have that perfect ratio and still have problems. Each chicken is an individual with its own personality, each flock has its own dynamics, and we all have our own set-ups and management techniques. I’m a firm believer that the more room you have the less likely you are to have behavior problems, but there are a lot of other factors. Plenty of people keep chickens at less than the perfect square feet of whatever magic numbers you read about. You just don’t get guarantees with chickens and behaviors no matter what magic numbers you use.
There is a world of difference between cockerels and pullets versus roosters and hens. Mature roosters and hens usually have it together. They act mature and usually have a peaceful flock. Cockerels and pullets are going through adolescence and usually don’t have it together. They are still individuals so some adolescents can do OK and some mature flocks can have problems, but the boys usually hit puberty well before the girls and have no control over those raging hormones. The girls hit puberty later so they don’t have a clue what’s going on and can’t do their part. Watching a flock of cockerels and pullets go through puberty is often not for the faint of heart regardless of magic ratios.
Breeders often keep one rooster with one or two hens throughout the breeding season without problems. But there is something very important about that. It’s roosters and hens, not cockerels and pullets. Of course there are exceptions, there always are, but normally they let the chickens mature before they decide if they are worth breeding before they make those pairs and trios. Mature chickens act more mature.