はゴメンだ

I want no part of …

→ は
phrase Uncommon #18,070
I want no part of … A blunt way to reject or say you want nothing to do with something. The part before は specifies what is being rejected.
JA: 残業はゴメンだ。
EN: I want no part of working overtime.

共犯になるのはゴメンだね

I want no part in being an accomplice.

— GHOST IN THE SHELL (1995)

わが子を埋めるのはゴメンだ

I refuse to bury my own child.

— エリート・スクワッド (2007)

俺はゴメンだ

Count me out.

— シティ・オブ・ゴッド (2002)

〝おじいちゃん〟はゴメンだ

No way am I being called “Grandpa.”

— JUNO/ジュノ (2007)

“飢え死にはゴメンだ”と飢え死にはゴメンだ

“I refuse to starve to death.” And I refuse to starve to death.

— 雪山の絆 (2023)

背負って戻るのはゴメンだ

I'm not carrying you back.

— 雪山の絆 (2023)