Well, fortunately, there is an option in the advanced start that lets you enable combat auto-resolving if you want.
I really hated the combat in the Total War series, but I loved the grand strategic part of it. So I just auto-resolved every battle and had a grand ol' time. A lot of people would say I'm missing half the game doing that, but since I didn't like that half, it was fine.
I will also note that I really disliked the combat in Homeworld, and a number of other kinds of games you might be thinking of, and couldn't enjoy those games at all because of it. But I am really enjoying the combat here, so you might find yourself surprised, who knows. It's a common thing for me to take something that I hate-but-want-to-like and make a version of it that I like; I disliked all space RTS games for one reason or another prior to making AI War, and that was the chief reason I made AI War.
YMMV in terms of if your tastes match mine, of course.