は苦手だ

to be bad at; to struggle with, I’m not comfortable with …; I don’t do well with …

→ は
phrase Uncommon #10,549
to be bad at; to struggle with Used for a skill or activity you find difficult or cannot do well. The plain ending だ is informal.
JA: ドイツ語は苦手だ。
EN: I’m not good at German.

私は物理は苦手だ。

I'm not good at physics.

即興でやるのは苦手だ。

I'm not good at improvising.

私は数学は苦手だ。

I'm not good at math.

ドイツ語は苦手だ。

I'm not good at German.

彼は聞き上手だが話すのは苦手だ。

He's a good listener, but he's not good at expressing himself.

魚釣りは苦手だ。

I'm not very good at fishing.

phrase Rare #32,232
I’m not comfortable with …; I don’t do well with … Often describes something or someone you find unpleasant or difficult to deal with, without necessarily meaning you hate it.
JA: 猫は苦手だ。
EN: I’m not comfortable around cats.

都会の冬は苦手だな。

I’m not a fan of winters in the city.

あいつは苦手だ。

I can't stand that guy.

ニンニクは苦手だ。

I don't like garlic.

猫は苦手だ

I'm not good with cats.

— オープン・ユア・アイズ (1997)

軍隊は苦手だ

I'm not comfortable with the military.

— 大人は判ってくれない (1959)

蝙蝠は苦手だよ。

I'm not a fan of bats.