the people in your ask box giving their reasons for not liking ronance is like. yes, you do you, but they are literally proving your point because what is it about a random f/f ship existing that makes people wanna argue against it ??? but yeah the anti ronance tag is truly a wild place.
This response is quite long, hence the read more! I kinda got off track and it goes into a discussion of canon vs headcanon and speaks a bit about Byler too.
If I were to be generous to Ronance antis, I think a lot of people are frustrated that there is a new canon bisexual character who's been introduced to the show but a lot of the fandom are ignoring her for a headcanon. And in general, members of this fandom and Ronance shippers are quite harsh against Rovickie and I don't think they'd be as harsh if it was an m/f pairing. Because it's the only canon gay pairing so far (I know it hasn't happened yet but it clearly will), people are expecting it to be this perfect romance like Jopper or Lumax but in eight minutes of screen time which is just impossible.