my guess: those 500+ people traveled forward in time to the movie's release & enjoyed it. conversely 80 people traveled forward in time and hated it.
IMDB taught me: cynicism is praised. optimism must be stamped out wherever it can be found.

Next thing you know, you're going to tell me that voluntary online opinion polls shouldn't be trusted as measures of the broader population's preferences. Dear God, I don't think we'll ever be innocent again

This will happen with every film with a large fan base and is why IMDB movies are jokes we saw the same with BvS, SS, Civil War and any other Marvel or DC CBM you could mention. You could look at idiots like Joby giving Dr Strange a 1 despite never seeing it and you have the reverse as happen as well with the 10's. Still the movie seems to have a rock solid seal of approval from the critics and that is enough for me to want to watch the film.
To make a great film you need three things - the script, the script and the script -Alfred Hitchcock

Why aren't they asian? Why aren't the all the asgardians white? Oh wait, look a joke. Suicide squad made a joke? Worst movie ever.

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Well hopefully there'll be no suffering then
of course i'm damaged, it's tattooed on my forehead isn't it?

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See that's the thing, I can talk to Rambo, we don't agree with each other on many things. Ogump's little gang of idiots don't have a singular opinion, they're sheep, one of them is even named appropriately
Your need to follow a group shows that you fear isolation
We all know where fear leads to.
of course i'm damaged, it's tattooed on my forehead isn't it?

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You'll never be accepted into Ogump's group spreading positivity, you'd better delete that before they see it
of course i'm damaged, it's tattooed on my forehead isn't it?

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I'm all good thanks, you appear to think that you're smarter than you actually are, I don't want to be the bearer of bad news but.
you're so ignorant that it probably wouldn't phase you though (it probably wouldn't be for the first time)
of course i'm damaged, it's tattooed on my forehead isn't it?

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It's not hard to follow, for people that know when to use plurals anyway
of course i'm damaged, it's tattooed on my forehead isn't it?

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Are you now listing symptoms?
of course i'm damaged, it's tattooed on my forehead isn't it?

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So self-diagnosis is a real thing?
of course i'm damaged, it's tattooed on my forehead isn't it?

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Oh of course, talking about people privately and on a public forum are so similar
Flawed
You're dumb
of course i'm damaged, it's tattooed on my forehead isn't it?

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People with inferiority complexes don't act like that, your logic is as flawed as your intellect
of course i'm damaged, it's tattooed on my forehead isn't it?

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Do you need the point that I'm making spelled out for you?
We've established previously that you have trouble with numbers, shall we add sentences to that list?
of course i'm damaged, it's tattooed on my forehead isn't it?