Experience Tumblr Like Never Before
Megatron who get pulled back from the dark side by someone else than Optimus (Rodimus, Dot Malto...)
And Optimus... has enough.
He passed millions of years trying to save his friend, giving him chances again and again, hurting himself by both the Decepticon's actions and his own despair, before - maybe - making peace that Megatron can't be fix. He's irredeemable.
Except he's not. Someone Megatron knows since less time than Optimus, who didn't have the quarter of the relationship they had, who didn't put a fraction of the time and effort and suffering of Optimus, manages to do what Optimus was incapable of doing.
Optimus doesn't want to do anything with Megatron. He doesn't want to talk to him or to see him ever again. He will not hurt him, but he can't forgive him for this betrayal.
Basically,