Apparently a lot of fandom and the Loki show itself believe that Frigga’s death was Loki’s fault. I decided to rewatch tdw in case I’ve missed sth and it was a good decision since yes I have had forgotten some details.
Let’s see what the movie shows us.
The Dark Elves could sense the Aether activating. That was what woke them up. And they also knew its location and the fact that it was on Asgard and they knew the convergence was close.
“You will become darkness. Cursed to this existence until it consumes you. Until then no power our enemies possess can stop you.”
Malekith to Algrim
The Kursed was indestructible by any power the Asgardians possess. None of the weapons, Elvish or Asgardian work on him not even Mjolnir(only their own elvish made weapon that Loki cleverly activated destroyed him). He could bring down the protective shields on prisons which was built of the same material that could protect the palace. So no matter how many guards was on his way he could still reach his intended location.
The reason Algrim could get into Asgard in the first place was because of Asgard’s incredibly weak and stupid security system that relied on 1 (one) guy who couldn’t see Dark Elves or Jane(or probably anyone who uses infinity stones, or simple invisibility tech or magic).
The reason Algrim could get into the dungeons under Asgard’s palace with no one noticing he is carrying a weapon inside a wound in his body, is again the same weak security system and an apparent indifference toward their prisoner’s health.
Speaking of the prisons, where are the dungeons located?
Here, deep under the ground. And there are stairs.
Oh look another set of stairs.
Which leads to the only way in or out of the dungeon.
A set of stairs that from the pov of anyone who wants to get out, they should turn left. Look at the only one direction that the guards running in to join the fight.
Anyway stairs, stairs everywhere. Remember these because we’re coming back to them.
Now let’s see the events from Loki’s point of view. There’s an explosion in one of the cells. A creature Loki has never seen before(or probably didn’t even know existed), is bringing down the cells’ shields one by one without any effort(sth as far as we know Loki can’t do himself) and Asgardian weapons don’t work on him and he can kill anyone with a simple touch. He is definitely a threat. The kind of threat Loki’s been dealing with during his time with Thanos. So he goes for an intimidating posture. A look that says I am dangerous and a threat on a whole other level than these scavengers. A look that means trouble and Kursed understands it very well . Loki’s Asgardian looks and his different luxurious cell adds to his hesitation and suspicion in freeing Loki. And he doesn’t risk it.
It is at this point that Loki says “You might want to take the stairs to the left”. Alright which stairs? The stairs that are the only way out of the dungeons and Algrim should have turned left to get out no matter what?
“Maybe there was a secret door somewhere in the dungeon.”
Ok how? Look at the structure of dungeons. It’s a long tunnel above a deep empty space. There’s literally nothing there.
Or maybe Loki meant these stairs? Alright then where? Right or left?
And after that? and after that? Did what Loki said meant Kursed should have kept turning left on each set of stairs to reach the security room where the protective shield control was located? A room that is clearly located far from the dungeons on the ground level because you can see the light of the day.
Or Do you mean the room was located right at the left of dungeons’ door? And right beside Frigga’s chambers? That doesn’t make any sense. Let me remind you how massive that palace actually is.
“Maybe that was a path with less guards so Kursed could move around easier?”
No? He is leaving a trail of bodies in his path because no one is able to harm him. And most of the guards are either busy with the prisoners or defending the palace and city.
Moreover at that point, Loki had no idea that this is anything but a prison break. He had no idea that the palace was under attack because it hadn’t happened yet. There was no sound of impact or the building shaking. Not until after Kursed was long gone. So Loki didn’t even have any reason to send Kursed to that room so he can take down the shield.
The way I see it what Loki says to Kursed is an attempt to get free. Loki’s telling him that he knows the palace. That Loki can be an ally if Kursed frees him. At the same time he doesn’t give him any useful information.
Also notice that at first Loki is not worried and doesn’t care what’s happening around him. Not until he hears and feels the building is shaking. Not until he hears the guards saying that the throne is under attack. That’s when he stands and looks around and tries to listen to what’s happening.
(And I think part of that indifference in the beginning is because of the trust he has in Thor. That Thor wouldn’t let anything terrible happen to their mother. One of the many reasons their fight in the boat is heartbreaking. Loki accusing Thor of letting Frigga die. The brother who Loki always looked up to, failed. Thor telling Loki that he wasn’t even there. The brother he never thought would leave his side was now far away. It’s also their shared grief and guilt. Neither of them were there to prevent Frigga’s death.)
So how could Kursed find the room and Frigga’s chambers easily in that massive palace? The same way they knew where to find Asgardians and their prisoners to get into Asgard without Heimdall noticing. They were an ancient race. Older than Asgardians. They had better tech and weapons and quite possibly prior knowledge of inner working of Asgard. Moreover as I mentioned earlier they could sense the Aether. That’s how Malekith and Kursed found Frigga and Jane.
“But what if it was what the movie intended to portray? That it was Loki’s fault?”
Well in that case they should start watching their own movies and make what they intend to show, not asking the audience to accept sth that isn’t shown and doesn’t make any sense.
But even then, even if Loki gave Kursed any notable info, Frigga’s death still isn’t Loki’s fault. Loki’s involvement is just a cog in the wheel of a series of events that end up with that result. It’s the butterfly effect, not the cause and effect. Which is actually one of the main themes of the movie. The convergence. The nine realms separated but once in a while the borders between them thins and they align perfectly so whatever happens to one happen to all others. Just like how we are living individually but our choices can cause a chain of events that affects a lot of people. So at the end of the day we’re all connected. Like the convergence that connected the realms to each other.