"Max bet exceeded" is really annoying to figure out how much lower wager has to be,especially when the window is small like live bets. A alert that you are limited or by how much would be a nice addon.
Just a thought.
You can bet up to $1 million on sports just contact support and they will direct you, even then if you qualify
I remember stake.com offers an increase in the amount of the bet in the last euro cup and I'm sure it's still active this day, first you have to prepare ID you will be asked to KYC to avoid money laundering or your source of funds

maybe you should also be at VIP level or big bet history