Gura's issues predated Jap, to be fair. Can't really blame him for her. There are definitely mistakes that were made elsewhere, though. While not fully related to Holo, both Ame and Kiara had company issues that just compounded with personal issues they were having. I mentioned music production issues with Bae, as well. She was pretty openly pissed about it in her membership post yesterday. Calli's getting her ass kicked with some management team, though that may be UMJ, but her music has generally suffered over the last year and a half.
It bothers me when people write off the company issues because it is much easier for the talents/livers to push back when the public is on their side. Unfortunately, AnyColor rarely seem to care what the Western public thinks of them, apparently.