Learn Turkish: Pasaklı ev arkadaşım odayı temizlemedi; şikâyet etmek nasıl olsa beyhude. - My messy roommate didn't clean the room; complaining is futile anyway.

It translates to 'anyway' or 'in any case' and expresses an inevitable outcome. Here, it highlights that complaining will not change anything, no matter what you do. Notice that it sits right before the adjective it emphasizes, beyhude.

What is the exact difference between pasaklı and dağınık?

While both can translate to 'messy,' dağınık simply means untidy or disorganized (like leaving clothes on the floor). Pasaklı is a stronger word implying that someone is unwashed, dirty, or slovenly. The speaker is emphasizing a lack of basic hygiene, not just a cluttered room.

Could I use boşuna instead of beyhude here?

Yes! Beyhude is a Persian loanword meaning 'futile' or 'in vain,' but it sounds a bit literary or dramatic. In everyday casual speech, saying şikâyet etmek nasıl olsa boşuna would be extremely common and means exactly the same thing.

Why is there no verb suffix like -dir at the end of the sentence?

The sentence ends with the adjective beyhude. In conversational Turkish, the present tense 'is' copula (-dir) is frequently dropped. You could say beyhudedir to sound more formal, objective, or emphatic, but leaving it off is perfectly natural for a personal remark like this.