Wait!? What just happened!?

I've really been enjoying this game. Sneaking around like a half-god, taking out orcs and captains, and finding new stuff as I explore different areas. The story has been fun too.

Then, all of a sudden, it changed. I'm building my own army? Watching orcs fight in a pit while I stand there doing nothing? Sieges? Dealing with defenses? It's like the game transformed into something else.

I'm sure a lot of people enjoy that kind of management gameplay, but is there a way to just skip it and go back to solo adventuring?