>Why do some people ridicule and demonize idea of men having beautiful wives in paradise in Islam and try to make it look cheesy?
They have to because God never promised them that and they want to "stay relevant."
>And some muslims having hard time to accept it as if sex is something inherently evil?
These people are eunuchs or like boys or they're just repeating whispers from shaytan, bro. And if they reject the ayaat, they're kafir. The maidens are voluntary, no one is forced to do something they will dislike in Jannah.