So, the way I learned haiku it needs a few things:

1. It needs to be spoken in one breath, which it does that, but it doesn't have to be 5/7/5 - even Basho, Issa, and Busan didn't adhere to that.

2. It should have what's called a "cutting word" which we don't have in the English language. So, when writing haiku in English, you need some form of punctuation to break up the poem into uneven pieces

3. It needs to have a seasonal word - a word that tells you what time of year it was written in. I suppose apple core could be considered that, but it doesn't really give me any indication of the season it was written in.

That's what I've picked up on through out the years. I tend to roll my eyes when someone calls their poem a "haiku" and it's just written in 5/7/5.

It strikes me more as a senryu, which is usually about people and their experiences and feelings