I laughed at the scene with Miyuki's mother, but is that supposed to be part of the plot? It seems like it could work, but everything around it seems to fail to fit. Also, Konata became a bitch and Tsukasa went insane out of nowhere; there needs to be some build up to both. I can accept Miyuki being randomly turned into a yandere(as out of character as it is), but there needs to be some sort of flow between scenes other than "Miyuki's dating Konata".
As for the translation, if he wasn't doing much more than cleaning up Google Translate, it would've been better to leave a note at the beginning rather than constantly interrupting the flow with "(I don't know)".
Why expend so much effort critiquing a steaming pile? It's because it's a steaming pile it's worth analyzing: you learn more from catastrophic failures than little hiccups, after all.