Hey, FMA have no such bad ending.
It was just a sadengind but not really bad. Ed stay alive, but in other world.
You should see the stupid ending of GSD. Every gundam has a hard story that have somo common sad endings, but make GSD end be so easy has really a stab in the heart of the fans. It was so awfull that they made a new one.
Can you believe in that??!!