Watching G1 and Starscream would ready to betray Megs at the drop of a hat. He left Megatron to die numrous times and literally built an army to kill at least once. And not like he was good as a henchman, he would flee at the drop of a hat. It was really insulting to Soundwave and Shockwave who were beyond loyal. Shockwave literally sat by the phone for 3 million years waiting for Meg's call.