うるさいんです

is picky about

→ 煩い
phrase Rare #30,591
is picky about Often used about someone who is very particular about something, especially food. うるさい can also mean “noisy”; んです adds an explanatory tone.
JA: 母はコーヒーにうるさいんです。
EN: My mother is picky about coffee.

父は食べ物にすごくうるさいんです。

My father is very picky about food.

母は僕の言葉遣いにうるさいんです

My mother is picky about the way I speak.

— アイム・スティル・ヒア (2024)