There are people who I have seen lose a big wager amount at a straight in gambling, but I haven't seen such a big one like yours unless that of the celebrity Drake and some others I see they post on social media, for which there is no source to verify the information.
When compared to artists, of course they show evidence such as streaming video clips or screenshots to convince people that they really lost that amount. The point is, don't take this as a serious thread, but let's just say that OP is creating a new discussion thread for all gamblers. in this forum.
Our co-members are questioning whether the amount could be a typo error but he's not coming back to address the question and the request to upload the screenshot or post the transaction, it's a good question and discussion so for the discussion I lost $200 its not really a big amount for others but big enough for me who live in the third world country, but summing all my losses its huge, I have more losses than winning but I have loss a big amount so I can say I'm still ok with my losses as long as I will not look back and calculate my losses.
So far I have not read any replies here posting above $200k but I guess that's what newbies do they want to show up their posts without backing up with proofs.