Support pages are usually separate and hosted elsewhere with Zendesk or some other similar services. That's probably why it's still up.
I'm not sure if it could be related to the old CEO though. I don't see why would he still have access to the hot wallets, after stepping down unless there was some backdoor he was aware of.
I think the site is not hacked or related since the other pages are accessible like the one hosted in Zendesk. If the Bitforex cPanel was hacked then the hacker will modify it and remove Cloudflare from where it is hosted.
I think it is due to the recent issue on Cloudflare here
https://www.cloudflarestatus.com/There might be some changes going on in Cloudflare that affect Bitforex which is why the site is inaccessible?