I don't see, if your thesis is that people hate Sid/Nate because it splits up their OTP, why that reason should suddenly go away because of the "enemies to lovers" storyline. There have been several hypotheses in this thread about why, in particular, people dislike Sid/Nate and not other Sid/non-Geno pairings. Obviously people are also upset about their OTP being split up but that clearly doesn't tell the whole story here.