Levistus's_Leviathan
5e Freelancer
The origins of the Goblinoid races in D&D has always been a mystery. Maglubiyet is a conqueror god that assimilates defeated gods and races. IMO, I think it makes sense for the backstory of Goblinoids to be the Feywild. Not to mention that Goblins in D&D are not accurate to Tolkien either, as Goblins and Hobgoblins were just types of Orcs in Middle Earth.Yes, I've heard the old "goblins are fey in folklore so it totally makes sense". It's bogus. though.
Goblins might be akin to faerie creatures in folklore, but D&D goblins are most decidedly not "folklore" goblins. They are very clearly almost entirely cribbed from the work of Tolkien, an author who doesn't assign any "fey" connection to his creations. D&D even maintains Tolkien's "mistake" (as stated by himself) of hobgoblins being bigger, stronger goblins. Suddenly assigning them an inherent "fey-ness" goes completely against how they are portrayed in all of D&D's history (including 5e) and strikes me as another of the eye-rollingly daft decisions of the design team under Crawford's tenure. You might as well give snake hair and a tail to D&D gorgons.
D&D 5E - Goblinoids in D&D 5e: Their Origin, Story, and Tragedy (+)
For much of D&D's history, it has had plenty of races whose whole identities and stories basically revolved around them being always-evil villainous humanoid mooks that the players can kill without having to deal with any sort of moral ramifications for mass-murdering them (Point 1 of evidence)...

And I also think that Medusa in D&D should be called Gorgons. The bull monsters could be called something less confusing.