全然分かってない

don't understand at all

→ 全然
phrase Rare #37,139
don't understand at all A casual, often critical way to say that someone completely fails to understand something or someone. The subject is usually understood from context.
JA: 彼は私の気持ちを全然分かってない。
EN: He doesn't understand my feelings 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

You don't understand the Andromeda Galaxy at all.

私のこと全然分かってない

You don't understand me at all.

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)

私のこと全然分かってないよね

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