This is a problem with roosters. You really cannot keep them all. They do not always get along, and wishing they would won't help. They have to be separated, if your set up does not allow for that, then they must be culled, which means they need to be removed from the flock, however you can do it. The screaming won't quit and neither will the fighting. And I am pretty sure they will soon be attacking you.
You can try either taking out the most aggressive birds or the most passive birds, but frankly I don't think it is going to work for the long term. I think you might get a temporary reprieve and then the problem will start up again. Space may be a problem, as birds grow, then need more space, what was enough space when they were chicks, rapidly becomes not enough space when they are full grown and the hormones kick in. I have had a bachelor pad, but there comes a point where they are more than likely are going to kill each other, which is very vicious and ugly. More ugly than a quick and merciful death in my opinion.
You can post on craigslist if you do not care to cull them yourself, or sometimes feed stores will take them. Don't ask question and get some nice hens.
This happens to many people new to the hobby. They think that if they treat the birds nice, and care for them, become attached to them, that the birds will be like other pets. Chickens really don't, they don't have a very large brain, and they are mostly controlled by hormones. They see us as an easy food source, and people often misinterpret that for love.
Mrs K