。
She's always complaining that she doesn't have enough time.
Literal
She [topic-は] time [subject-が] not-exist [quotative-と] always grumble copiously [copula-だ].
不平たらたら ('copiously grumbling') combines 不平 ('complaint, grumble') with たらたら, a mimetic meaning 'in an endless stream.' いつも ('always') reinforces the habitual nature. The sentence characterizes someone as a chronic complainer — the combination of the mimetic with the formal noun 不平 creates a vivid image of nonstop griping.