Your statements are weird! I am an American (USA that is.) I started using TransferWise (now Wise) when the issue of requiring the format of the transfer having to be in international format and not the approach all US banks use even to this day, domestic transfer,
When I first did transfers, it took three business days, holidays were considered weekend days.
Now as Wise continues to grow, I get my transfer done overnight! I begin the transfer at 8PM Thai time (9AM EDT.) My money is in my Bangkok Bank account at 2:14PM Thai time. So, if that is slow, so be it. No issue for me.
By the way, I have a Bangkok Bank Savings account.
I would imagine if you are having a problem, it most likely is being caused by your home country bank not by Wise