So, Mog station here we are

[Edax]

Where did they bash their own products? I don't see them doing that anywhere.

Not to meme but dude, it's not that deep.

When SE emailed the Warrior of Darkness and called them dull.

mun·dane
/ˌmənˈdān/

adjective
1.
lacking interest or excitement; dull.

...thats... thats how advertising works. They're trying to seel you something

From my experience as a Graphic Designer, using insults or derogatory terms in the taglines when referring to the potential customer is a no-no. Simply having the tagline say "Be Marvelous" would have been sufficient since that would be a wholly positive message while also having a similar call to action.