A bit of a lag when I just opened the site in the post. Maybe because on the start page there are some videos, which makes my computer a bit laggy.
Maybe it's just your internet connection. Tried opening mine and the website interface showed quickly. I even tried it to access on my phone and it just works fine even if at mobile data.
Cloudbet's been running many years now. It's the first website I get to know way back 2018 in terms of sports booking. Their website improved a lot since then, they now offer some casino games unlike before that you can only bet on sports matches.