The Infinity Gauntlet and the Infinity Stones were at the center of Avengers: Endgame after over 20 films that introduced a number of superheroes as well as the main objects of the story: the Gauntlet and the six Infinity Stones.
The Thor film as an Easter Egg before the studio decided to go for the Infinity Gauntlet arc as the main theme for this first part of their connected universe. However, the subsequent films and appearances of the Gauntlet left a continuity error that the creative teams could have fixed at different points in the saga.
In the post-credits scene of Avengers: Infinity War, it was revealed that Thanos forced Eitri to make one for him in exchange for sparing his race. Thanos went back on his word and destroyed the entire Dwarf race, except for Eitri, ruining his hands so that he would be incapable of forging another gauntlet (or anything else, really).
If Odin’s gauntlet was a fake and the one in Thanos’ possession was made for him, then where is the real gauntlet? Besides, having two – a fake and a real one – to avoid what was inevitable made no sense as anyone, not just Thanos, could have had one of their own if they asked the right person (in this case Eitri). This could have been avoided by either not giving Avengers: Infinity War and Eitri to explain how Thanos got his, or giving a different reason for Eitri’s mutilated hands, making Thanos’ gauntlet the real one and the one in Asgard the fake. After all, Thor would have ended up approaching Eitri anyway as he needed a new weapon after Mjolnir was destroyed.
This mistake doesn’t change the course of events that led to Avengers: Endgame, the same way fixing it or avoiding it wouldn’t have changed them, but it would have been one less continuity error and loose end to worry about when piecing together everything that happened in Marvel's Infinity Saga.
