Here's a few things that are a little odd to me about Alice's claims of abuse (I'm not saying I don't think they're true): Why would her sister claim she's making the allegations up? Her sister was on tour with her, too. Her sister is the one who is claiming that it is Jupiter that is fucking with Alice and has a grudge against Ethan.
I guess the one other things that has always bugged me about Alice is how big is she is about how her aesthetic is hers alone (when like it or not, Ethan seemed to have been the main person who curated it). It comes off as so childish to me and the fact that she started shit with Grimes and is happy to talk shit about Edith - mainly complaining about how she "stole" her aesthetic - really rubs me the wrong way.
Furthermore, I have followed the Crystal Castles since their breakup and Alice, and a lot of Alice's recent music hasn't been well-received by CC fans, whereas CC's newest album seems to be more liked (the main compliant being how Edith isn't Alice) and solidified a lot of peoples' belief that CC was all Ethan. I feel like she definitely chose well in her timing of coming out about the incidents.
Also, the FB post only mentions him throwing out her phone, which is fucked up, she mentions her hair is lost, but it doesn't detail whether that is from stress or directly from Ethan. For me, there's no contest that Ethan is controlling. Whether he domestically abused Alice, I'm not sure.