I haven't looked at the OP post, just the title - I think that, by itself, is an interesting question. 'Have we become spoiled game players?'
Honestly, I don't think so. 'Spoiled' tends to indicate that we have regularly been handed only the best-quality goods, with everything else - even decent titles - just getting swept under the rug and ignored. That's simply not true. There are plenty of good, but not great, titles that still get positive reviews that, while falling short of the truly great games, still encourage people to buy and play them. The indie scene is full of these, and many critics like to highlight the good ones.
Instead of 'spoiled', I would say rather that there are two problems. One is a swell of gaming critiques we have access to (some right here on the Escapist, even!) all coming from sources of varying knowledge, expertise and validity to their claims, added on top of the natural difference two people will have in terms of how good or bad a particular title is. With so many people judging and complaining about every title, it's easy to see why some might think the gaming public is simply never satisfied.
Second, and more importantly I think, is that gaming really is evolving into something different. People that grew up in the 8-bit days are unused to epic storylines and multiple types of gameplay in a single game, and will see the demand for award-winning scripts and 'more complex' gameplay as unnecessary. Likewise, those from the 16-bit era could never play games like NBA Jam or Generic Football '96 online against someone in a different state or country, so now they can't help but wonder why every freakin' game in the universe has to have multiplayer.
In short, video games are basically going through growing pains. Now that there's a truly pronounced generation gap between old school and new school gamers, and developers have more tools and opportunities their disposal when making games, everyone's trying to understand what the modern 'good game' is. This leads to the glut of critics I mentioned above.
So no, I don't think we're spoiled. I think we're just trying to figure out what it is we want in games, and nitpicking every detail we can in hopes of finding the answer.