It's actually quite flattering. I spent a lot of time learning from others too, and I'm still no expert, but I'm happy to share what I've learned with others.
Your ratios are off. You barely have enough hens if you put all of them in with one male and get rid of the other. That is probably the cause of the aggression causing the head injuries.
The lump on the chest might be a tumor or a cyst, but the picture really isn't clear enough to tell. Is a...