So, let’s make this clear for everyone that still complain.
How does real life work? You make your decisions, you work forwards a specific goal and then in the blink of a second, everything you worked for is gone and what you did doesn’t matter anymore.
Exactly that happened to the main protagonist of Mass Effect. I loved the original 5 last minutes of ME3. I was so shocked that all my decision didn’t matter anymore. It was a fantastic plot twist I never expected. Everyone that complains seems to be a fanatic fanboy or someone that never read a good book or someone that lost the connection to reality, else they would understand how amazing this decision of the story writers was.
That’s it. Think about it!