1) It's a turn-based strategy game. Slower, longer games are a property of the genre, just like speed and split-second decision-making were a property of 90's FPS's. Maybe TBS games will speed up in the future, just like FPS's slowed down in the '00's, but for now, complaining about a TBS game being slow is like complaining about a motorcycle being a ****ty car for lacking two wheels. You knew what you were getting into.
2) You can save and reload mid-mission. Launching a mission doesn't commit you to an uninterrupted hour of gameplay.
3) "Average gamer" isn't a useful concept anymore. The medium is so fragmented and its audience so diverse that no game is going to appeal to everyone, and every game (except some of the zero-effort trash in the bowels of Steam) is going to find at least a niche audience. That's not to say that there's no bad games, but when your chief complaint about a game is a well-established property of its genre, then maybe--instead of the game being bad--you're just not the audience for that game.