It looks more like typical wear from having a rooster. If he were too rough you would likely see wounds. Sometimes roosters are able to mate without as much feather damage as they get older, so your hens may have better feathering in the future after they do molt. Once they get their new feathers in you can try using a chicken saddle to prevent feather loss on their backs. I personally haven’t had success using them because they either slip them off or the rooster still damages the wing feathers, but it is an option.