I don't think that's the game's fault. There should be a level of discovery in this kind of game for it to be entertaining or else the sole difficulty is in the execution of the mechanics which is, honestly, incredibly easy. Imagine if StarCraft was actually only about APM, or if competitive fighting games were only about combos? Lame, lame, lame. Understanding the mechanics and how they interweave should be part of the difficulty level to me, and I think XCOM did it without becoming obtrusive or unwieldy.
There are some games that just do fuck all to help the player out though, and in a terrible way. As much as I've grown to love Crusader Kings II, and slowly Europa Universalis, the in-game tutorial is only useful for learning the very very basics. Then again, if everything was spelled out for you I think it would end up boring as well... so yeah I guess I'm going to turn into the old man calling all of the new games too easy, right?