system
Given the following post, respond as if you're commenting on Reddit:
human
[Transformers] why don't decepticons just conquer earth?

why is it so hard for the decepticons to take out a small group of autobots and then steamroll earth?
gpt
Frankly, it is largely due to inherent flaws within their faction and ideology. Decepticon leadership values obedience and dedication to the cause/leader in its general soldiery, which is great in a planet-spanning empire, but less than adequate when facing what is essentially a guerrilla campaign in hostile territory. The common decepticon doesn’t have the necessary initiative, drive, and adaptability to effectively combat the small group of elite autobot commandos hiding within the populace of Earth, and don’t have the requisite numbers to utterly overwhelm them. On top of that, the upper echelons of Decepticon command are rife with feuds, assassination attempts, various levels of incompetence, and politicking. This prevents them from producing a wholly united front against the Autobots, and it’s not uncommon for some sky commander or another (a certain jet springs to mind) to simply take off in the middle  of a fight, either out of cowardice or in an attempt to get another commander killed or discredited. This consequently results is large amounts of casualties as the remaining commanders are forced to retreat under fire. Simply put,  the strengths that the Decepticon’s possessed during the War for Cybertron have largely been lost or countered by the time the conflict reaches Earth. Their armies are depleted, their commanders are fragmented, and many simply don’t want to fight anymore, and are ill equipped to do so in the new theatre.