が苦手なの

not good at; uncomfortable with

→ が
phrase Uncommon #10,931
not good at; uncomfortable with 苦手 means being poor at something or feeling uncomfortable with it. The sentence-ending の adds an explanatory tone and can make the statement sound softer; it is common in casual speech. The が marks what the speaker has difficulty with or feels uncomfortable around.
JA: 私は人前で話すのが苦手なの。
EN: I'm not good at speaking in front of people.

クモが苦手なの

I’m not good with spiders.

ゴキブリが苦手なの

I can't stand cockroaches.

トム鶏肉が苦手なの

Tom doesn't like chicken.

が苦手なの

I can't stand the sight of blood.

トム踊るが苦手なの

Tom isn't good at dancing.

暗いが苦手なの

Are you afraid of the dark?

人間関係が苦手なの

I'm not good at dealing with people.

暗い場所が苦手なの

I don’t like dark places.

が苦手なの

I’m not good with cats.

が苦手なの

I'm not good at drawing.

絵を描くのが苦手なの

I'm not good at drawing.

彼女の娘さん料理が苦手なの

Her daughter isn't very good at cooking.

暗いが苦手なの

I don't like the dark.

歯医者さんが苦手なの

I’m not a fan of the dentist.