Doubt!? How can you doubt it?? It’s not like we all just imagined these things or made it all up. Liz said all this in interviews, and in lyrics that she herself wrote for her album. If you don’t believe it then you can go read the interviews she did or simply just listen to the songs and/or read the lyrics of the songs. I’m just stating exactly what she has said.
Here is the interview where Liz says Tommy is possessive, that he forced her to give up music, that the relationship gave her lots of emotional turmoil, that the break-up was very nasty. She admits that the whole album is about him and their terrible relationship and nasty breakup.
The whole interview is here : http://thelahstarling.tumblr.com/post/76720034168
Some ScreenCaps - http://thelahstarling.tumblr.com/post/79966193167
Another interview, where she says the albums is about her “caustic romance” with her ex-boyfriend, and that she is very happy to be away from him and so glad that she “Finally found the nerve to walk away” from a bad relationship.
Direct link to the interview - http://www.artistdirect.com/entertainment-news/article/exclusive-video-premiere-starling-glow-we-are-infinite-dave-aude-remix/10863630
Finally, the Lyrics to her song “Broken Record” (which she admits in the interview above is about Tommy). Liz says here that he is a liar and a cheat, then sings about how she wants him to burn in a fire. Nice! Read the lyrics here : http://thelahstarling.tumblr.com/post/76984023874/broken-record
And, let’s not forget Liz’s friend Brandt, threatening to break Tommy’s hand if he ever used it to hit or to try and choke Liz ever again. He says he knows all about Tommys “longtime abuse” of her and then admits that Liz confessed to him that Tommy is an alcoholic. When people asked what the hell he was talking about he said he was just trying to protect his dear friend Liz who had been in a very abusive relationship with her ex Tommy. Screencaps of what he said and him admitting it was Liz who told him about the abuse is here - http://adamsmyobsession.tumblr.com/post/77056359184/zxtjr-loveskiss-gladamfan-i-find-everyone
So yes, she did say all those things.
Why so surprised though? It’s not exactly the first time this happens. She’s been talking shit about him after every damn break-up they had. First time she accused him of cheating on her with his ex Ariel. Then she said she wanted to throw bricks at his head. Another time that she absolutely hated him and wanted nothing more to do with him ever, and then said she was planning to get “revenge” on him. Well, she most certainly got her revenge :/