にはもううんざり

fed up with

→ に
phrase Rare #36,776
fed up with Used to express strong annoyance or exhaustion with someone or something. には marks what the speaker is fed up with, and もう adds the sense of “anymore” or “already.” Often sounds blunt or emotional.
JA: この仕事にはもううんざりだ。
EN: I'm fed up with this job.

林檎ジュースにはもううんざりしてるの

I'm already sick of apple juice.

ローマにはもううんざり

I’m so sick of Rome.

— 甘い生活 (1960)

お前の家族にはもううんざり

I'm sick and tired of your family!

— 箪笥<たんす> (2003)