が苦手な

be bad at

→ が
phrase Rare #28,720
be bad at Used to describe something someone is not good at or feels uncomfortable with. The が marks the thing that is difficult, and な connects the phrase to a following noun.
JA: 私は人前で話すのが苦手な学生です。
EN: I'm a student who's bad at speaking in front of people.

トム簡単な計算が苦手なんです

Tom is bad at simple calculations.

縦列駐車が苦手なのよ

I'm not good at parallel parking.

いまだに物理が苦手なのか

Do you still struggle with physics?

トム弟のティムうさぎが苦手な魔法使いです

Tim, Tom's younger brother, is a wizard who's afraid of rabbits.

ほうれん草が苦手な人もいます

Some people don’t like spinach.

コーヒーが苦手なのよ

I’m not a fan of coffee.