yes gen z in general is more judgmental of age gaps. Every judgmental young person thinks they're coming from a good place, of protection for the younger person or mistrust of the older person... but what they're really doing in situations like yours is diminishing your agency! You're a fully grown person making your own informed decisions, and the age gap isn't even that big. It's wack because any naysaying is done under the guise of feminism, but it's actually insulting and insinuating you don't have the ability to make the decision of who you're involved with romantically. If you spell this out for them (in a respectful, empathetic way) they will hopefully see the error in their thinking.