So what you like it too easy.. too easy = booring! True , sometimes is annoying to grow your army and get it killed it happened to me too , 3 times! So that's why when i battle i try to put all my critical wounded squads to a safe place to dont get them killed... You want to dont loose your squads? Then become a better commander
Also try to use your dragon more so you don't kill your men and your dragon can kill lots of enemy soldiers easily if you know how to do so, if you are new maybe you dont like the idea but lately you will know what im talking about