okay so, assuming you don't know anything beyond like. 4 characters: Megatron is depicted as a revolutionary in several of the continuities which bleeds over to the fandom perception, and he of course falls into that "bad guy makes good points so we need to have him commit genocide so people don't agree with him" camp. The comics published by IDW up to a few years ago had Megatron be essentially at the very bottom of the working class, while Optimus Prime was a fucking cop. Megatron rightfully pointed out the injustices on their planet, but was Too Radial™ about it, so of course he became the evil warmonger and Optimus Prime (canon police brutality enjoyer) went about it the Right Way™.

The comics series has had a MASSIVE impact on both the fandom and franchise itself, with current cartoons continuing to pull from it. It wasn't all bad, there are some interesting characters and in-universe concepts that IDW introduced, but what I've described above has left a really bad taste in my mouth.