First, I disagree with and flatly reject OP's suppositions.
I see a lot of people barking about how a game isn't "incomplete" because it has DLC, which is kind of funny because that's mostly bullshit, and that's the attitude companies enjoy because they know they can fleece people with incomplete games loaded with DLC. Like good little apologists drinking the kool-aid.
My thought on incomplete was that it was about games that needed patching though. Some games, like Skyrim, are so terribly buggy that it's obvious the game was incomplete (some quests aren't even finish-able....at all).
Since this is more about DLC, how about LA Noire: Complete Edition? Grand Theft Auto IV: Complete Edition?
What about this bullshit?
http://www.destructoid.com/assassin-s-creed-2-dlc-was-part-of-the-original-game-158512.phtml
I tried to find the escapist's link to basically the same story, but I couldn't.
And then there's Saints Row the Third and it's 40 weeks of DLC, including cheat codes, which used to be fucking free.
Or Mass Effect 2 and 3 and it's "outfits", again what used to be a feature in a game is actually now a thing they charge you for. My old NES games gave me free alternate outfits and cheat codes, so did my PlayStation, my PlayStation 2, my Xbox, Dreamcast, SNES, Genesis, Sega CD (yes, I still have one of those), Game Boy Advance, PSP, PC, for fuck's sake my cell phone even does it for free, even with it's "premium" games.
Then there's the shitloads of Day-1, such as:
Dragon Age Origins
http://www.escapistmagazine.com/news/view/95305-Dragon-Age-Origins-DLC-Will-Be-Available-Day-One
Dead Space 3
http://www.escapistmagazine.com/news/view/122564-Visceral-Defends-Dead-Space-3-DLC
And our favorite, on disc DLC:
Street Fighter X Tekken
http://www.escapistmagazine.com/news/view/118328-Street-Fighter-X-Tekken-On-Disk-DLC-Dated
Metro: Last Light
http://www.screwattack.com/news/metro-last-light-disc-dlc-causing-quite-stir
Mass Effect 3
http://www.escapistmagazine.com/news/view/116234-Day-One-DLC-Files-Appear-on-Mass-Effect-3-Discs
To that last point I give you Jim Sterling:
http://www.escapistmagazine.com/videos/view/jimquisition/5625-On-Disc-DLC-Cannot-Be-Justified
Not to mention Season passes, which were, once upon a time unthinkable to gamers, now an accepted reality. Again, here's Jim:
http://www.escapistmagazine.com/videos/view/jimquisition/6863-Previewed-Preordered-Prescrewed
If you are tired of being ripped off or at the very least feel you aren't getting what's appropriate (ie RIPPED OFF) you shouldn't buy their games and you should continue to ***** about it, even if you never bought the game. Complaining about something doesn't require that you own it. If you choose not to buy something because you think a feature or part of it is unfair or unworthy of your money, shutting up so that only the people that do like it can spend their time playing adulation and affirmations with one another in a big circle-jerk nothing would ever change, and sometimes companies will listen and course correct (I give you Microsoft and it's Xbox One as an example). You're best bet is to hold your cash, be more selective about who you support, and remember you don't have to play everything. Being a choosy buyer is like supporting economic and creative Darwinism, and that is a very good thing for the consumer.