I doubt Megatron is going to be tossed around as "easly" as you say. This is the guy who was wrecking Optimus Prime in close quarters. The same Optimus Prime that was able to take down beings like The Fallen (Hes ALOT stronger in the comics. The only reason he preformed so poorly is because he was fighting the only thing that could defeat him). Megatron had half his head blown off and was still able to fight as seen at the end of DOTM. We also have to take into Consideration that Megatron is an intelligent sentient being, unlike a kaiju.
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