So, by the explanation in "edit2", your problem is not "diversity" it's a problem with storytelling.
If that is truly the case, why comment about orientation at all? Just say the Destiny storytelling is sub-par. No one would have disagreed, no hubub.
Methinks the answer to that queston is that you are deliberately stir the pot.
English
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Basically the fact that a character is gay in this comic resonates with OP in some way or another. If the ‘forced diversity’ was truly a big issue, then OP would have simply turned a blind eye. If writing is the issue, don’t bring politics into it
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Because when they focus so hard on these political talking points, they ignore the actual plot of the game in favor of a romance about gay lovers just for the sake of saying, "Look see! Look see! See how diverse!"