Only bfx and Kraken have USDT/USD markets. Bfx is unbelievable POS when in comes to fiat withdrawals (and you can only guess from what shithole money will hit your bank accoutn if they ever do). Kraken absolutely DOES usd withdrawals (it's a USA company after all) via Etana custody and their own OTC desk (100k min). Money will be sent from legit USA banks. I can only say good things about them really. If you don't have Etana option in your withdrawals try contacting support, because it may have not been rolled out to everyone yet.