It's better to find a provider or casino that can really give us an advantage if we want to bet on the lottery so that we are not burdened with tax costs which in my opinion are inappropriate.
Lotteries are always associated with high prize reward, that is even considered an insane amount.
It's already usual to always expect that a tax is associated with winnings here. National lotteries for example, in most cases, there's an associated task. Besides, we can't compare the prizes between the national lottery and the lottery that was organized by a gambling site, for example, that's why maybe there are some lotteries that don't charge tax-related expenses.
Anyways, I'd rather participate in a national lottery and I'm fine with paying taxes there compare to looking for an effort to find a casino for the reason you have mentioned. But before anything else, what should I be worried about tax as what matter here first is, I should win no matter what lol.