Is this usage of どころではない sensible?

Question

Referring to pulling a cracker:

パーンと破裂するどころではない。大砲のような音をたてて爆発し、...
It didn't go off with a bang. It exploded with a sound like a cannon.

This どころではない grammar is new to me and I'm having trouble with this sentence.

My references give the following descriptions:

1. conveys the meaning that that this is not a situation in which such-and-such can be done (A Handbook of Japanese Grammar Patterns for Teachers and Learners).
2. A phrase expressing that an action or state is simply impossible due to an adverse situation. (A Dictionary of Advanced Japanese grammar)
3. ...the actual situation is considered to be even more remarkable than the phrase that どころではない is attached to. This grammar pattern will be seen at the end of phrases indicating some situation which is not ideal. (bunpro)
4. ... used when you have some other thing to worry about and cannot focus your attention to what you want to or are supposed to be doing. (Aguijanazo's answer here)

The first part of 3) above seems to be the only definition that works with my sentence but then the second part goes on to say something different.

Meanings 1), 2), 4) and the second part of 3) all feel compatible to me but do not work with my sentence.

What is the truth here. Is "the actual situation is considered to be even more remarkable than the phrase that どころではない is attached to" a valid meaning, and the other references just forgot to mention it? Can it somehow be folded into the other definitions?

Any help on clarifying this phrase's usage would be appreciated.

Answer 1

3 seems closest, where it says 'far from (A)'.

Has the speaker been told that there would be a bang? If so, the line is basically contrasting expectation and reality, like "A bang? That was way more than that."

This is a similar example:

出産は痛いどころではないらしい。

This basically says that childbirth is not just painful (=expectation), it's far more than that.

I think the other references talk about other (arguably, more common) usage of the phrase where impossibility (often due to distraction) is implied, so they don't fit here.