Yeahhh I saw this coming a mile away. He's gonna pull a Shoji isn't he? I'd rather they just break up because he isn't happy with her anymore or something
Oh, don't get me wrong, I completely disagree with you, I still think the translation is good. I just don't care to change your opinion on it, because I think you're being unnecessarily harsh as a bit.
"that's not my father" is grammatically correct. The second sentence is a little wordy but the meaning comes across. The third one is also correct, although a little awkward.
These are incredibly minor things to ask for someone to be fired over.