What they never showed us in Transformers EarthSpark
Hashtag: Stop it, Starscream, this isn't like you! You're not a bad guy.
Starscream: SINCE WHEN?! When on this worthless Earth have I ever become a quote unquote "good person"?!
Megatron: You were at the Maltos' barbecue last week!
Starscream: Yeah, and I brought potato salad.
Hashtag: The Decepticons can never become good.
Optimus: Everyone, no, you mustn't! We need to work together in order to eliminate the remainder of GHOST's forces!
Hashtag: But I thought defeating Croft and Mandroid meant they were all gone.
Optimus: But there's still a chance that Croft has loyalists out there! (Starscream points his Null Ray at Prime) There are potentially so many more Terrans out there and we need to teach them how to live! (Starscream charges his Null Ray) But we-
Megatron: Optimus, stand aside. You'll only make things worse.
Optimus: (sighs deeply in frustration) Why do I fucking bother anymore?
(later....)
Robby: Starscream, I don't understand. Why would you go back to being evil?
Starscream: Of course you don't get it, organic boy! How could you? You, who had never suffered the atrocities of war like we Cybertronians have? Megatron had sacrificed everything for peace through tyranny, not caring one bit about everyone who gets in his way, not even his own subordinates! But now that he's turned traitor, we have lost the one thing guiding us. The Decepticons have lost their edge. And now, we're practically those Terrans' babysitters! I'm seeing the Seekers hanging out with Arcee, and Breakdown coming to Bumblebee's movie nights! Listen to me, little one! I'M USING HIS FUCKING NAME! But now, with GHOST and Mandroid out of the way, I finally have the chance to take what is rightfully mine and return the Decepticons to greatness, no matter the cost! And if you insist on standing in my way, then I will blast you into ash.
Robby: Oh great, Starscream has a midlife crisis now.