When the “Gremlin D.Va” meme first started making the rounds, I was very much against it, but was eventually convinced it was harmless because everyone seemed to be enjoying it. I realize now I should’ve stuck to my previous convictions, because it really is a garbage meme.
The main argument I remember being made at the time was that the meme was good because it rejected the sexualization of D.Va’s design, and more broadly of young East Asian women. Inverted it in fact, by turning D.Va into something that couldn’t be sexualized at all. But the thing is, you can’t claim you’re progressive when all you’ve done is trade one form of dehumanization for another. Instead of being objectified, D.Va was infantilized, and even more extremely made into something sub-human (a “gremlin”).
This isn’t about D.Va “being an adult”. Even if she were 16, or 12, or whatever, you can’t dehumanize a character and claim no harm no foul. And “at least it’s not porn” isn’t an argument in its favor, either. Try considering her as a character, something that doesn’t appear to have been a struggle for any other character in overwatch.