OK, so I figured out what else* it is, at it’s core, which bugs me about Charge’s storytelling:
TL, DR: Einar doesn’t have the street cred for this kind of high profile heist. 
Einar just doesn’t work for me as a character. Or not as that character.
His acts (the heist as such) to me, has the spirit of some very naive, childish idea/concept of what a heist and a burglar actually are.
It’s much like what a child imagines a burglar to be like: A badly shaven dude, wearing a shirt with black and white stripes and a black Zorro-mask, who in one hand carries a grappling hook on a rope and a bag of loot marked with a large $ in the other.
Basically how a kid would dress up as burglar for halloween (you get the idea).
While Einar isn’t literally like this, his heist and the way it is shown very much breathes this spirit (that’s how I see it, at least).
So while I can maybe make myself believe Einar is desperate enough for this kind of (solo!) undertaking, I cannot make myself believe he’s competent to actually pull it off.
There may be places where people live under conditions much like Einar’s in some slum or sth., and right next to them is the mansion of some filthy rich druglord.
By the kind of naive logic Charge’s storytelling brings to the table, this would result in the hoodrats and havenots from the slum breaking into the druglord mansion and stealing a Maserati, despite the fact everyone in the neighbourhood knows the druglord’s guards are trigger-happy thugs etc.
Such things don’t happen. That’s not how the world works.
And this is also in a sense exactly what I was referring to earlier with that scene from ‘Heat’:
The crew in ‘Heat’ ooze professionalism in what they do (if ‘professionalism’ is the right word here… sounds like you can study it. Then again, you can, they just call it jail rather than university). Einar doesn’t.
Just like Al Pacino says himself one scene later:
HEINZ
You recognize the m.o.?
HANNA
M.o. is that they're good.
Once it escalated into a
Murder One beef for all
of them after they killed
the first two guards,
they didn't hestiate to
pop guard numbe three,
because, what difference
does it make, why leave a
living witness?
Drop of a hat? These
guys will rock and roll.
The shaped charge: The
shaped charge indicates
that they are technically
proficient. Proficient
enough to go in on the
prowl.
So let's start looking for
recent highline
burgularies that have
'mystified' us.
So back to ‘Charge’, the bottom line is, I don’t buy it if the short wants to tell me Einar has this kind of proficiency (and courage, and cold-bloodedness).
It’s like if ‘Breaking Bad’ had made the mistake of showing us the version of Walter White we get to know in the pilot episode, and then have that exact person, the way he is at that moment, suddenly pull off the showdown from the last episode where he frees Jesse, and skiped all the transformation inbetween which is the only thing that made the Heissenberg-version of Walter believable.
Now of course that’s an unfair comparison for matters of available screen time alone, but it’s really just an example to better illustrate what I mean.
While the Blender Studio lacks the luxury of the screen time needed to make such a transition plausible, that leaves two other options to make it work:
One is showing Einar as a character in the ability of whom to pull off such a high risk, high profile heist, we can believe without major mental gymnastics, the other is make it end in a disaster, as is to be expected otherwise.
They went for neither of these options, nor kept it low profile enough to be believable (like the ‘The Walking Dead’ cinematics posted above do).
That leaves us with some sort of McGyver-clichée, being one of the most overused things anyway. How many feature length movies are there who have this kind of hard-boiled lonly wolf character who lives in some kind of secluded cabin in the wilderness and catches salmon with his teeth like a grizzly (well, something along those lines…)?
I shudder when I think about the fact the Blender Studio basically rolled with this clichée, down to the skandinavian unshaven apperance.
I know the beard was for the sake of the new hair system and the islandic setting for the sake of some geothermal power plant idea.
But still I wonder, have they (maybe subconciously even) just taken over the stuff seen in e.g. ‘Hannah’, ‘The American’, ‘No Time To Die’ (and countless other movies), which has the secluded hideout virtually always in some kind of nordic wilderness, and their hero bearded and unshaven and icefishing etc.
They virtually never hide in the Sahara** or any such place and it does make me wonder if there are some Leni Riefenstahl subtexts in contemporary action movie popular culture tropes like that (hard boiled heroic badasses are bearded and nordic and wouldn’t wear a kufya).
Back to ‘Charge’, one may argue it’s a David vs. Goliath story, but then again, even in the old testament that only ends well for David because of help from god.
Einar has no help from god so to me it all leaves the impression of the outcome of some brainstorming. Like they went with about the first cookie cutter clichées they could think of and then tried to make it work without working on it (enough).
Kind of like “let’s have a robot with a machinegun, because it’s badass”.
This way we’re full circle back with kids dressing up for halloween as burglar.
Maybe you’re tempted to tell me I should not overthink this all so much or I need more suspension of disbelieve.
Unfortunately that argument sounds like telling people they need to get drunk to like the party. 
But don’t worry, I only analyze all this so much because I like doing so, it’s not really about who’s right or wrong here.
greetings, Kologe
*(other than the sudden change from trigger-happy robot fight to zero danger for Einar already discussed)
**‘Star Wars Ep. IV: A New Hope’ gets an honorable mention for at least trying.^^