what was Isayama thinking?
Making useless sub-plot after sub-plot without actually progressing the main plot itself. (Compare 124-135 Chapters to 110-122 Chapters)
If  all these build up were to actually made peace ending, then we're doomed.
Even then, if all these build up were bout to waste anyway, ended in tragic way anyway. Why bother wasting all of 10 Chapters?
If He actually had planned between the two, why not just choose the euthanasia Ending. (better than slowly ruins and killed your own manga)
The only possible salvation was "In the end it doesn't matter ending, equal destruction, everyone dies". Which is a really cheesy ending, but fit better with all these cheesy buildup final Arc too.
Or is this what He really mean by hurting the readers. Then fuck you too Isayama.