To me, a ‘bunch’ conjures up cut flowers tied with a ribbon for sale. Although of different colours and varieties, flowers are often mixed randomly— which might be called chaos. I have heard ‘confusion’ used as a collective word for flowers.
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spur011The sentence in question can be taken to use "bunch" as a synonym for "a large group of," which I think is acceptable usageThere are people who do that, but, it's poor use of English. There seems to be a fashion for misusing the word "bunch" to mean a lot of something.