The zoomer interpretation of "ick" is just an extension of patriarchal attitudes. It means "anything that does not perform masculinity to an adequate degree". Fruity drinks, splitting bills, wearing strange colors or patterns, even having well-groomed nails.
It's childish, it's petty, and it's self-defeating. Most women I know are in a vicious cycle of misogyny because they actively optimize for misogynistic men without knowing it. They then come to the conclusion that men must suck, so they tighten their "standards", which inadvertently results in even more misogynistic men going for them.
We often hear about gen-z men becoming more conservative but anyone who is paying attention knows that gen-z women are also becoming more conservative. And, a lot of the conservatism in men is in response to growing conservative attitudes in women, and vice-versa. We have trad wives and bio-essentialist ideology because conservative men exist. And they exist because they meet our arbitrary patriarchal standards, even the small ones, like paying for the bill.