For me, Stake has the best UI. The worst ones are Nitrobetting and Coinroyale.
I've visited Nitrobetting site, personally it's not that bad and I don't experience or feel any off in the theme and design and they do load fast but compared to top gambling sites like Stake, they definitely a little bit left behind and regarding Coinroyale, they can definitely improve but I've seen way more bad UI than this actually this is not actually bad at all. But more importantly as long as the platform can be easily accessible and can easily be understand by player and it all works, there's nothing to get worried about.
And I also think it's actually wrong to compare really big and highly successful casinos to those ones that are still (maybe) maybe struggling to stay afloat.
To me personally, Nitrobetting and coinroyale is not in any where comparable to Stake in terms of revenue and user base, so we need no prophet to tell us why Stake will always be or have the best UI compared to this small casino, first is, Stake has the money, I mean really large money to lavishly spend to get whatever they want, and secondly, they've got the workforce as well, very well experienced developers that can get almost anything imaginable done, and even if they don't, they have the right resources and connections to hire as many as this type of developers as they want, so, personally, I will be ultimately surprised 🤨 is Stake doesn't stand out in terms of UI comparison.
So, what I am saying in essence is that when we compare, we should endevour to atleast, compare casinos that we assume to be in the same category with each other, in terms of userbase and revenue generation, this should help us arrive at a result that is much fairer for all.