I've had it with her! Nothing but whining.

I want to stress, that although both Tatiana and Tatsiana say "her/she", this can can mean either "her" or "you", i.e. can be addressing her directly.

Gr: ...is moan and moan

OK, corrected, thanks

Not quite... ALL you do/she does is moan and moan.

Sorry, I wrote NAG AND NAG the first time, influenced by the other translation. You have “the only you do” - it should be “ALL you do...”

Yes, I see. Corrected.

If it's "she", would it be moan or moans? I.e. is it a verb or a noun?

It’s an infinitive, so it’s not conjugated: all you do is (to) moan and moan.

✅