I’ve downloaded the Chrome app to my iPad and SMB running ok using that. And to clarify my earlier statement, the site doesn’t run slow, it just simply freezes and it’s impossible to nagivate anywhere.
What version of iOS you on? 9 something?
If you have tried a full restore I’m not sure what could be causing the freezing on this site, unless it’s the adverts as well somehow? As it’s not very graphic intensive!