This Gauntlet was nothing more then a fake. In Ragnarok, we see a model/sculpture of the gauntlet in at the Etri's smith. The gauntlet most likely needed a certain size to properly have the right specifications to withstand the power of the infinity stones. Which explains the size. The gauntlet was simply there as a trophy for Odin and to make everyone ...
But in Endgame when the heroes traveled back in time to get the Infinity Stones, at the events of The Avengers (2012 film), we see that Hulk from that time period talking. Which was never shown in the Avengers movie.
It's established that the Hulk can talk coherently provided he's not in complete "rage" mode during, say, battle.
When he bashes Loki he ...
Niffler is correct, Thor is powerful but the hammer also has power in itself and can only be wielded by someone who it considers worthy.
In addition to this though there is a scene from one of the previous Avenger movies where a number of the Avengers try to move the hammer and all fail much to Thor's amusement...with one exception.
Captain America doesn'...
Whoever is worthy can possess the power of Thor.
From the first Thor movie:
Whosoever holds this hammer, if he be worthy, shall possess the power of Thor.
So, since Cap is worthy, he possesses all the powers of Thor.
Every planet and place Thanos went before acquiring the infinity gems, he left 50% of the population alive, that applies to Thor's ship as well.
Those Asgardians alive were part of the 50% that Thanos spared, and they escaped to earth with Valkyrie.
The details of how they reached the Earth are not mentioned in the movie, I imagine Thor's ship had some ...