I don't know if everyone is "hating" on her as much as just a little gentle mocking. She's a short OH with a skill set average or above average that kept her hanging around the NT for years and years. She was never going to have a breakout year, match, or set. No one was ever going to write "Yes! Uchiseto banged it"
So I think everyone just wants her to get out of the way to give others a chance, others who might have a breakout
What happened last year (at WCh) was she was deployed as libero. Her receiving skills are good, but WTF? Some suggest maybe Koga liked her because she was old, maybe Manabe liked her. She wasn't a great player but she also was one unlikely to make a big mistake
She retired at the end of this season. Saying that life as an NT libero ended her career is a stretch, but it's funny
😂 poor girl but at least she did her thang on NT