Dont give up too quickly.
How old are your birds?
You should have 8-10 hens per Roo. So if you have 2 Roos you need to house them seperate from your hens or get more hens so there are enough to go around.
Sometimes getting started can be a rough process but keep at it things will get better...
If you see injury remove that bird immediately and keep them seperate. You may not have needed to cull that one. How many hens do you have for your 2 Roosters? If you dont have enough hens they can get injured.
Oh and