Yep, a lot of people just want to pretend the ending and new stuff don't exist outside of bad fanfiction.
While her slobbering fans may be loud online, I doubt most of them these days would risk getting outed as a NHer in real life now that they know they're truly the minority among the fan base.
As I said, the loudest voices on the internet do not always reflect reality. In fact, it's usually the opposite (hence why the need to be so loud)
This kind of reminds me recently of what happened with Captain Marvel. It was a big trend to bash on both the character and Brie Larson herself over a statement that was well-intentioned at worst. These fools were convinced CM was going to bomb big time, claiming "SJWs can't afford movie tickets" (based on WHAT?). Everywhere you searched on youtube, a video would pop up talking about how CM would be a disaster and Brie would ruin the MCU.
And next thing you know, the movie makes a billion dollars (I think it's STILL in the Top 5, even with Endgame already out), and Alita Battle Angel doesn't do so hot despite them pushing it (that is not a black mark on ABA, mind you. It just goes to show that just because a loud group pushes for something doesn't mean it reflects what the public at large is into).
And these fools still won't leave both the character and BL alone...kind of like how NHers would bash Sakura to kingdom come and gloss over her good points. Whatever legitimate criticism there is gets lost in the sheer lunacy of it all.