Being fair, I tend to play it sandbox mode, with the largest map and a lot of opponents. It gets better as you go on, as they system of unit perks and buffs that you can get seem never ending. Add in hero recruitment and artefacts, plus magic research and you will realise the depth of the game. As I say, it gets better the deeper you go.
“O Lord God, let me not be disgraced in my old days.”
'We few, we happy few, we band of brothers'