The ending of Mass Effect 3 did not fit in with the story line in any shape or form. Throughout Mass Effect 1 and 2, the decisions we made could drastically affect the game play. However, in Mass Effect 3, although there are 3 possible outcomes, all 3 lead to the same conclusion. Commander Shepard is killed, and the Mass Effect Relays are destroyed. Regardless of how you choose to end the story, the outcome is the same overall.
There were many confusions in Mass Effect 3, for example, why was the Normandy flying through the Mass Effect Relay in the first place during the ending? Did the Normandy really have to be ripped to shreds? Why couldn't the Crucible be a weapon, like we thought it would be throughout the entire game? There are many unanswered questions, so I'll stop here before I start to rant.
I think many will agree when I say that all we really wanted to do in Mass Effect 3 was to destroy the reapers and be reunited with our crew. Instead we received a suicide mission with a fate doomed for our destruction.
Bioware, if you're reading this, please give this some thought. We are your fans, we bought you games, many of us purchased the entire trilogy. We loved Mass Effect 1, we loved Mass Effect 2, some of us even loved most of Mass Effect 3. However, the ending was an utter disappointment. For a game of this magnitude, a game of such huge popularity, we assumed that you would have put fourth an amazing effort to conclude such a great series. Obviously, you did not.
Listen to your customers, listen to your fans, please make this right.