While there are no magic numbers, it's usually recommended to have in the vicinity of 1 rooster for every 10 hens for most common backyard.
I have too many roosters right now with 3 males and about 20 hens and will soon be culling to reduce disruption.
First, how big is the coop and the run in feet or meters and how many chickens are in it?
Bullying and other negative behaviors are often -- though not always -- connected to crowding. Also, how many males to the number of females? An unbalanced ratio can cause social trouble in the flock --...