I wish I had stayed away from this thread, but I couldn't resist. I knew the _____ was going to hit the fan when Ned was killed off. It was a shock in the book too! There are many more shocks ahead - good or bad depends on your point of view. This series is very complex and twisting. It is not simple. In terms of vengeance, there is no straight line from point A to point B and that is what makes this series so great IMO. It is very realistic and unpredictable. Bad things happen to good people and the good people fight back, but in different ways which is what makes them the "good" guys and not the "bad" guys.
Wofford, all I can say to you is if you are willing, try and have some patience and stick with it. However, I can guarantee you that this series will NOT satisfy your definition of vengeance so if you can't accept that fact then this series is not for you and you should stop watching now. If you are willing to see how things play out, then try and keep this in mind...there are characters and events that you have not even met yet that have big implications on how things continue to unfold. Vengeance is a dish best served cold.
You did yourself a disservice of sorts by reading those spoilers you posted because while technically they might be "true", you are missing all the indirect actions, events and relationships that led to those spoilers. So while you got the end results, you missed out on all the events that led up to them.
One last thing about the books. All the chapters are told from the point of view (POV) of several of the main characters. This is a great device that lets the reader know all the inner thoughts, motivations, regrets, emotions, etc into that character. So while people are saying that Starks = good and Lannisters = bad, it is not that simple when you get to see the motivations, regrets, etc of those characters that doesn't always come across on screen. There are characters that will seek redemption and there are characters that will fall and my opinion of these characters changed in the course of reading the books. I think the tv series is following a similar path and you might be pleasantly surprised (or just more p!ssed off) with how things play out.