It's hard to say that somebody's expectations for what they want in a parter are reasonable or unreasonable - you're allowed to decide who you spend your time with, and if that means you don't spend time with anybody, you're either satisfied with that or you change your expectations. If somebody says "I want to date somebody who is emotionally available", it's not anybody else's place to say "Wow that's completely unreasonable of you".

Same thing when somebody says "I only want to date a man who's rich, taller than me, conventionally handsome, and will cater to my every whim" - do you meet that criteria? Maybe not, but they've decided that they only want to date exactly one person in the entire world and they're gonna hold out until they find exactly that person, who are you to tell them they're wrong? It's their life.