>>12258759A lot of reasons
I'll just copy fom other threads
The test stream mishap was incredibly minor. The only thing people saw was a low resolution thumbnail, the archive was never available. It was just something the antis knew they could use as a weapon, and some thing cover thought they could use as a shield to defuse the situation.
There were a bunch of Hololive antis, and VTuber antis in general who just didn't like her on principle. There were even dedicated 5th gen antis who thought they were getting a free ride, since they started with over 100k subs, when the earlier gens had to work their way up from practically none in comparison. Their consensus was that Aloe didn't deserve her popularity and would be the easiest to break. They dredged up her past and shared it with the others.
Delu isn't, and never was, seiso. There's a reason she picked a succubus. When she was a horny teenager with more hormones than foresight, she made a load of tweets about sex (now deleted). Since she was supposed to be a singer, there were a bunch of idol fanatics among the vtuber and hololive fandoms who simply could not accept her for her openness about sex and the existence of her (ex-)boyfriend. Even though, as Narukami put it, if you're expecting seiso from a succubus, there's something wrong with you.
The other main factor was that on a long-forgotten stream several years prior, Delu claimed that a Nijisanji member had retired due to doxxing and harassment. From the perspective of listeners, it was a pretty big rrat being presented as if it were a fact. She also mentioned that the same happening to her was one of her deepest fears. She also went on to mention that some vtuber companies place enormous restrictions on their talents, (one example given was not being able to have a boyfriend). At the time noone really cared, and noone had really seen the video except her own fans. She never name-dropped Nijisanji when talking about this, but Nijisanji fanatics who'd been angered by the rrat assumed she was referring to Nijisanji.
When MASS started their support campaign, the antis only intensified their attacks, feeling they now had someone to fight against.
Even that wasn't enough to break her. That is, if it wasn't for the biggest anti of all, Kusodad. He made the harassment she got from the above 3 groups pale in comparison, and who threatened her into quitting her dream job simply because he was annoyed by the antis phone calls. Now with her dreams crushed, the antis still calling, kusodad in a foul mood, and nowhere online to escape to, Delu took the only way out she thought she had left. Thankfully for us, her shit luck in life extended to her attempts to end it, and she didn't manage to even break a bone.
The "as long as you're alive, there's possibility" message from Botan was ominous then, and even more so in hindsight.
Nijifags dug up a video to get other nijifags and unicorns pissed at aloe, then spent half a year harassing her with home calls, threats, and by riling up her irresponsible/abusive dad.
No, they were Niji fans. The "unicorn" part was mostly an excuse. The "problem" was that before Hololive, she talked about hearing from a friend that Niji was a black company with lots of bullying going on internally. Niji fans thus harassed her, sometimes using some of the tweets she made before hololive that reeked virginity to somehow make her pass for a whore. I can't tell if you've fallen for their tactics or are one of them.
The fun part is, some time after her graduation, the Roa bullying was revealed and led to Roa not streaming for a few months (although from what I heard the bullied girl wasn't exactly truthful either).
Niji antis have always been really aggressive against Hololive, while the opposite isn't true. This doesn't mean that all of Niji is bad or anything like that, but Aloe's graduation was first and foremost due to Niji antis.