I am talking about the GENERAL OPINION of the k netizens and fans. So please don't come here using one tweet as evidence.
Even though everything went to shit in the beginning I think public opinion changed after the Burning Sun scandal. I remember seeing comments like "with all the crime others are doing is it worth getting angry at dating?"
Even Jennie didn't get a lot of hate. I mean yeah with Kai but it wasn't really about the dating. It was more like YG princes scandal + lazy scandal + dating that caused this storm of everyone hating on Jennie and then they just stopped and now they love her. When the news about GD came out the only negative comment was that people considered GD too old. Then we had V and Jennie who basically everybody accepts are dating...I expected people to lose their minds over it but no one generally did. Compare this with 2nd gen Generation Taeyeon and EXO Baekhyun and the scandal that happened. Some EXO-Ls still hate on Taeyeon for dating him.
When Joy was announced dating I thought the fans would get pissed but no, the general census was "lucky guy". Nobody cared with Twice either. Everybody says NCT's Haechan and ITZY's Ryujin are dating but again no one really cares.
I think in general people are starting to become more accepting of idols dating. We still have a way to go yet but I think Hyuna and Dawn being so open with their love really did a lot to sway people's opinion.