The author tried pulling a Zero Requiem like in Code Geass but forgot that at no point did Lelouch straight up lie to the audience (hell even certain characters) about his intentions. But the real reason why the ending sucked was because Eren was unironically right, the outside world was ***ed and wanted nothing more than to eradicate Paradis for something that they were no longer responsible for.
And after Eren failed to kill everyone, what happened? Paradis gets carpet bombed lol

Originally SAO was written as a short story for some Novel Prize in Japan, but the author went over the page limit (lmao) and the story wasn't accepted.

Some years later he participated in another one of those contests, won and both the novel that won and SAO were published.

The problem was the story of Aincrad was already over by the first novel so the author decided that it was better if he made up new MMOs and stories instead of telling a non chronological story in the original setting, and the end result is basically what we have now. He does still write Progressive which takes place back in Aincrad and covers every single floor but those come out super slow and there is also no way that he won't stop writting them once he reaches like floor 25.

>Working the night shift on Friday
Enjoy the weekend my dudes.

>Watch the Rebuilds
*** no, never ever recommend that shit to anyone.

That's a cool story but the original is better.