The real question everyone should ask here is why in the world would anyone play a game 20,000 times after never winning once lol. I mean we all heard of and probably chased some losses but dang that's another level. I hope that person gets help and takes the $19k back as a gift. That's brutal from draft kings though I'd never play the slots there again.
It was not just one player who played that 20,000, there are a lot of them and so they go on a conclusion that it was rigged or set up wrong that's why they raise the red flag. And they are all correct that's why they are compensated by Draftking.
Maybe some of us here have played our favorite slot games for like years and never hit a single jackpot, and yet we continue to play and believed that casino is provably fair. But it's obvious that there are rare cases like this that the slot games have been set up so that no one can win.