I was just thinking back at the expectations I had before I finished the game.
When Cerberus got the Prothean data on the Catalyst, I was expecting that I'd have to make a call between allying with TIM again or at least following his conditions (which would cost me other allies) and sending him to hell, keeping my allies, but being forced to go on without any information on the Catalyst. None of that came to pass, however, and the attack went on to Earth.
Somehow I always felt Shepard was not going to survive the game. There were signs even midway through, situations where everyone could see how worn down and tired Shepard was. I thought that in the end I'd have to make a final decision, something along the lines of sacrifice Shepard for the best possible outcome for everyone else, don't sacrifice Shep and rely only on your fleet (which would make the outcome depend on EMS alone), or fail entirely in some way.
And then starchild happened and everything just got torn out of my hands. No matter which option I'd pick, there would be no outcome I could find myself agreeing with. So I chose, and then I realized that I would never learn the consequences of my final choice.
Did I want a happy ending? Not necessarily. I wanted an ending that wouldn't be so empty, that wouldn't defy and negate pretty much everything a saw in Mass Effect. I could have perfectly lived with Shepard ending up as the tragic hero, I would have even accepted the deaths of every single of my squad mates, though it probably would have made me very sad. I would have saluted every single one of them, as I did Thane, Mordin, and Legion. I would have saluted Shepard in the end.
I wanted to see what all those sacrifices were for. I wanted to know what the galaxy was going to be like after that devastating war. I wanted to see krogan children play on Tuchanka, quarians without suits on Rannoch, aided by the geth, I wanted to see that Salarians suffer the consequences for not supporting me in the final battle. And I wanted to know what happened to my crew and my LI (assuming they were still alive). I wanted to see Anderson embrace Kahlee, I wanted to know what would become of Garrus and Tali.
Instead there was nothing. There was no sense of accomplishment or noble sacrifice, only confusion and frustration. Mass Effect deserves to be better than this. BioWare can make Mass Effect better than this. That's why we must hold the line.