I apologise at the outset for two things: the length of this post, and my own prejudices.
The second of my apologies stems from the case that, while I saw all the posts about the endings in the days leading up to and after release, I had convinced myself that all of you were simply "playing it wrong." I mean by this that I fully believed people were simply not being thorough enough, perhaps hadn't played ME1 and 2 and were thus missing some content. After finally finishing my first playthrough today, having missed only a few sidequests due to finishing Tuchanka too soon, I apologise to those I prematurely judged.
When the From Ashes DLC fire roared up, I was bothered mostly by the characterization of the standard edition purchasers as "buyers" rather than fans. I bought the CE, but I can fully understand a genuine fan either not having the money or not being quick enough to get a CE. I had my opinions on the fairness of this particular DLC but I largely kept them to myself because they were conflicted: I appreciate a smart business move but I am uncomfortable with the way in which Javik was implemented, I'll leave that at that.
These endings, however, are not something on which I can remain silent about or uninvolved with. The game itself, I believe most fans, old and new from every price bracket, would agree, is solid. I didn't really care for the catch-all "A" button (obviously played on 360), but I'm one of those who played more for the story than the action. I enjoyed the story and can forgive plot holes here and there. I can ignore loose threads when those tied up are tied well.
I cannot ignore it when at the end, any one who has shown dedication, loyalty, and put in a significant amount of time and emotional investment with this game is slapped with the realisation that the choices they've made, the characters they've grown with, (and if you've played from ME1 you have grown with these characters), and the preparations they've taken amount to at the very best a traumatic and unsatisfying "TO BE CONCLUDED."
I get it, fewer people will buy DLC if it just adds to the pre-Crucible missions. The best move business-wise is to release DLC that sees Shep rescuing/finding his crew and LI. We'd pay for that, and probably will.
This series was about many things, but two themes were present throughout; the relationship between "man" and "machine" and the ability to triumph despite the odds. The endings take the former and dumb it down to the point of frustration, and they take the latter and judge you unworthy. Certainly the threat is dealt with. But the player IS Shepard. Bioware made these games with that intent. The series is the story of Shepard, and you are Shepard, therefore this is your story. And what happened to your story? It got taken away from you, the story of your friends was no longer your own, the story of how you prevailed was not a happily ever after, and the story of your happiness was dangled in front of your face and smashed upon the rocks.
I am upset, angry, and disappointed with these endings because none of them ended the way I wanted them to end for Shepard, my Shepard. These endings make me think he was never really my Shepard at all, and that simply hurts.
Thus, I join the movement.