Back in the day, there were always a few people that complained about the Civilization battle calculations. It was RNG that implemented well, and you could accurately determine your chances of success and plan accordingly. But if your Army was only 1 or 2 guys going around, sometimes they would get unlucky and lose to a much weaker unit. So people would bitch and complain "It's unrealistic that my tank would lose to a spearman!" So the developers eventually changed the calculations to be a combination of what players would "expect" and game difficulty, while also hiding those formulas. Then the game became mostly unplayable to everyone who enjoyed tactical strategy.