Elop didn't kill Symbian during Elopcalypse. Nokia had already decided to kill Symbian before Elop took over. The cancellation of S^4 was the real death date for Symbian. Only the fanbois believed Symbian to have a future after that. S^4 cancellation had been decided few months before Elop took over. He just annouced a decision already made before his time.

S^3 never had the chance to compete and it wasn't even supposed to compete with Android. It was originally just a stop gap before S^4, which was supposed to be modernized version of Symbian. Under the Vanjoki plan, S^4 was cancelled and S^3 was to be used until Meego scaled down to cheap products.

You can blame Elop for killing Meego and (especially) for the idiotic decision to replace Meego with WP7 instead of Android, but he isn't the one to blame for Symbian's death. Besides, Symbian was a walking dead anyway. It needed to be put out of it's misery.