“Doing the right thing cost me, it didn't work out, and I'd do it again.”

The honest move backfired. You told the truth, kept the word, returned the thing — and it cost you, and the world did not reward you for it. Here is the part that matters: you don't regret it. That's the proof that your integrity was never a strategy for outcomes. It's just who you are. Right action that survives a bad result is the only kind that was ever real.