Myth: The Decepticons are justified in attacking Earth because humans are lesser beings and the Decepticons need resources.
Fact: If this is true, then you think that white people were justified in taking their big ships over to Africa and enslaving the darker-skinned inhabitants.
Myth: The Decepticons are all loyal comrades to each other.
Fact: -Starscream tried to overthrow Megatron many times, and failed.
-Shockwave overthrew Megatron and succeeded.
-Shockwave and Scorponok fought a Decepticon civil war for leadership.
-Swindle sold off his comrades for spare parts.
-Cyclonus thought the non-Unicronian Decepticons made "excellent gun fodder."
Myth: Decepticons are oppressed by the Autobots.
Fact: When you behave like asshole imperialists with god complexes, don't be surprised when the rest of the world doesn't want you to have a military again. I'm looking at you, Germany!
Myth: G1 Megatron gave two shits about his troops.
Fact: "Warriors are expendable, the important thing is that I get what I deserve!" -Megatron,, "The Immobilizer."
Myth: G1 Megatron was a competant tactician!
Fact: BWAHAHAHAHAHHA!!!! Oh wait, you're serious. Permit me to laugh harder.