You have had a rough start, but I think you made good decisions.
Roosters are a crap shoot, some work, and some don't. When they don't you need to cull them one way or another. Some people have enough space to tolerate a rotten rooster, but the longer I am in this hobby, the more particular I...
Here is my advice.
* measure your coop, is it big enough?
* get rid of this rooster
* just keep hens for one year, get some experience
* Next year, look around for a mature rooster. People tend to cull mean roosters first, no one really likes to cull, so nice roosters get to live longer...