OP, stop chasing jackpots. You’re already independently wealthy, you don’t need to gamble with such huge amounts chasing jackpots. If you really have to gamble & with such large stakes go & play poker in Vegas. You’ve probably got a much higher chance of winning lots. Speak to micgoossens, he’s a good poker player. He might be able to point you in the right direction of where to play etc.

I know a lot of online casinos are provably fair but also if you like to play roulette a lot do it in a physical casino not an online one.

I always feel you have a higher % of coming out with profit in a physical casino rather than an online one when playing roulette or card games.