As far as the movie goes, it's a dark elf sword, made by dark elves, that injured a dark elf (Kurse), that was wielded by someone with superhuman strength (Loki).
Also, it could be said it would as only due to Loki's strength that the blade pierced Kurse, since an Asgardian soldier tried to cut Kurse with what looked like an electrified sword but was just stuck in his armor. At 1:05 https://www.youtube.com/watch?v=-oGAMiZoCu8
Now for some nitpicking
Autocorrect sucks big time
Now getting to the topic. The first instance you're comparing to is from Avengers and the second one is from Ragnarok right?
Then isn't that a bit of picking and choosing? The problem with that is it allows anyone to pick whatever showing they feel like even though there are contradictory ones. For example you mentioned Thor turning Hulk 180 degrees with a punch in Avengers. Yet here in their fight in Ragnarok https://www.youtube.com/watch?v=NcLmyi46VYA
You can see Thor delivering similar punches at 2:25 and 2:35 while clearly hurting Hulk, does not produce that much effect as they did in Avengers. Or his other barehanded blows for that matter
And then for the second one, as you said, Hulk gets Thor on the ground and beats in him but does no visible damage in Thor Ragnarok. But back in Avengers, Hulk gives him a nosebleed with one punch https://www.youtube.com/watch?v=SLD9xzJ4oeU
And then Kurse also doesn't make Thor bleed till he throws the rock in his face https://www.youtube.com/watch?v=we-cs8LvoCk
Then , in a slightly different comparison, Thor managed to stop Hulk's punch with one arm and started to push them back with two in Avengers, suggesting close strength, but then in Ragnarok knocked the large hammer out of Thor's hand by meeting the double handed hammer strike with his fist, which would mean clear superiority
In the end all these doesn't matter, but I am a sucker for the small details
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When someone annoys you, it takes 42 muscles to frown but only 4 to reach out and bchslap them upside down on their head
Except I didn't pick and choose different circumstances. I picked the exact same attacks on two different characters. Then I picked him receiving similar attacks from two different characters. Both had different outcomes.
Now, I will agree with you on the nosebleed part. But you will not find a closer comparison of the two then what I gave forth.
It is fairly clear that the writer intended for Kurse to be a bigger physical threat then the Hulk. Or anything else that Thor has faced thus far.
Look. I understand you want Hulk to win guys, I get it. But as of right now, he simply does not have as good of feats against Thor as Kurse does. Fact.
If you read my earlier post I supported Kurse winning - voted too
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When someone annoys you, it takes 42 muscles to frown but only 4 to reach out and bchslap them upside down on their head
1. Hulk in Ragnarok had already been trained for an unknown number of years by Valkyrie whereas he was completely untrained in Avengers. That's a decent explanation why a simple cross from Thor spun him 180 in Avengers whereas his base and footwork were more solid in Ragnarok.
2. The punch that made Thor bleed in Avengers was a sucker punch. He was unprepared for it and it caught him square in the face. The ground and pound in Ragnarok was delivered while he knew he was in a fight, so even though they landed flush to his face it helps a lot if you're able to brace before impact. It might also be argued that Hulk in Avengers was an angrier Hulk (being mindphucked by Loki's scepter) than Ragnarok Hulk and thus stronger.
3. I don't see what the issue is here. Thor needed to use both arms to fully halt Hulk's overhand smash which seems to indicate that Thor's 2 arms is roughly equal to Hulk's 1 arm. So Hulk catching (in one hand) a hammer blow from Thor delivered by 2 hands is not too far off. The weight of the hammer should have added a bit more oomph to the hit but honestly at the strength level of these guys that extra weight would be miniscule. There's also the concept of forte and foible of weapons, or the strong and weak portions. Basically, the further away from your body you hit with the weapon (in this case at the very end of a hammer) the harder it will be for you to push with the attack. There's more momentum so the initial hit is harder, but as soon as that momentum is gone it will be hard for you to push further, as is the case of Thor hitting with that hammer.
In the end, the real clincher for me is this: body shots. Just look at how Thor's body punches affect Hulk vs. Kurse. Hulk obviously gets hurt by Thor's punches whereas Kurse barely flinches.
Plus a nose bleed isn't really a great indicator of damage. Been slightly nicked on the nose once and got a slight nose bleed and got into a full blown brawl in the ring (got a shiner, small fractured on my wrist and some teeth got a little loose) and didn't get a nosebleed at all. Sometimes we get it sometimes we don't.
Only Thor at the end of Ragnarok, the one who unlocked his thundergod powers. Thor at the time he fought Hulk in the arena seems no more powerful than TDW Thor. In fact even less powerful since he didn't have Mjolnir.
You forget that Thor got buffs in AoU. Thor never used his mjolnir properly against Kurse.
And I keep saying this, Thor's fight with Kurse wasnt at Thor's best. His mother just died, he was emotional. Personally, Thor wasnt fighting properly.