Well, first I'd say that those three DLCs cost a maximum of $45 and not $60, if they were MSRP, with current MSRP being a little less than that, but I don't know if they ever got a price cut. Second, Steam sales happen like clockwork, for DLC as well, and there's no way I spent $45. Third, the right feature to the right person might be worth that price, and that's the benefit of their model. Over the course of so many years, they can keep working on the game and add niche features, some of which might be up your alley, rather than putting out a base game that lacks features important to you and never expanding the game.

I'm not sure why the tutorials for features you don't have are a problem, because then you wouldn't be doing the things they're doing anyway, but I'm sorry that ruined the experience for you. It's really hard for me to call that a cesspool though. They just put out a lot of product where you can decide what's important to you, and I'd say that's exactly what it ought to be.