It seems an obvious statement but roosters are not hens. One needs to change pretty much all the integration techniques used for hens when it comes to roosters.
Roosters earn the trust of their hens. Dumping a new rooster in with an unrelated and unknown group of pullets is unlikely to be successful.
Imo, now you have no acceptable options left and the rooster has to go. Such a shame.
Understanding more about how and why roosters behave the way they do might help you out should you decide to try keeping a rooster again.
I wrote this article to help people understand their roosters. It's a long article with a lot of information given in the stories.
https://www.backyardchickens.com/articles/understanding-your-rooster.75056/
Roosters earn the trust of their hens. Dumping a new rooster in with an unrelated and unknown group of pullets is unlikely to be successful.
Imo, now you have no acceptable options left and the rooster has to go. Such a shame.
Understanding more about how and why roosters behave the way they do might help you out should you decide to try keeping a rooster again.
I wrote this article to help people understand their roosters. It's a long article with a lot of information given in the stories.
https://www.backyardchickens.com/articles/understanding-your-rooster.75056/