I Starscream am now leader of the decepticons
Starscream thinks he's the boss, but Megatron usually kills him before he can even act like it.
Starscream tried to be cool and act like he was in charge, but Megatron killed him before he could even finish his first line.
He tried to be the new leader, but Megatron just killed him and took the throne.
Starscream was so full of himself he forgot to breathe, and Megatron killed him mid-sentence.