Attack Speed Question

So I've been wondering for a while, why the displayed attacks per second don't translate to actual animation speed.

The character I mostly play uses Dominating Blow linked with Multistrike.
When I hover over the thumbnail it says the attack time is 0.17 sec.
That means I should get around 5 attacks in per second.
The animation does barely 2 attacks per second. The guardians generated by dom blow on the contrary fire off their attacks like machine guns, so multistrike seems to be working for them.
Normal attacks have an attack time of 0.21 so that would be 4 attacks per second, but those feel like its maybe 1 and a half attacks per sec.

Is there something I'm missing?

In case this might be why it feels like you're missing something:

https://www.poewiki.net/wiki/Multistrike_Support

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Since Multistrike repeats your attack, the time between uses of the attack is equal to three times your attack time. (Or four times in the case of
Awakened Multistrike Support)

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Jadian#0111 wrote:

In case this might be why it feels like you're missing something:

https://www.poewiki.net/wiki/Multistrike_Support

"

Since Multistrike repeats your attack, the time between uses of the attack is equal to three times your attack time. (Or four times in the case of
Awakened Multistrike Support)

My dom blow isn't repeated though. The minions attacks are, which is nice, but mine are not.
Plus I also tested it with the normal attack, which isn't supported by anything and should attack for at least 4 attacks per sec, but isn't the case either.