全然分かってない

don't understand at all

→ 全然
phrase Rare #39,818
don't understand at all A casual, emphatic way to say someone completely fails to understand something.
JA: 彼は私の気持ちを全然分かってない。
EN: He doesn't understand how I feel at all.

私のこと全然分かってないわ。

You don't understand me at all.

あなたはアンドロメダ銀河のことを全然分かってないね。

You don't understand the Andromeda Galaxy at all.

私のこと全然分かってないよね?

You don’t understand me at all, do you?

お前全然分かってないじゃないか

You don't understand it at all, do you?

— ニュー・シネマ・パラダイス (1988)