Perhaps, they have added the clause 2.1 recently.
It could be but there’s no way to verify if they recently added it or it has been like that and the Op didn’t see it.
I tried to check if the site was archived before anything was altered but web archive is not working on my end prolly due to my network. Another thing again, I’m sure that during the time Op started playing at the site his Ip must have been that of Russia why didn’t the site block his account then to prevent usage of their site why wait until Op had that amount before requesting for kyc? It seems like a shady business tbh.
It is possible the cached version of the casino exists somewhere on the Internet and in that case we could verify when that clause was added, if it was there before the third withdrawal of the OP then as bad as this looks the casino will be on the right, especially with that clause which states the English version of the terms of service supersede the rest.
However if this was a recent addition to their terms and it appeared after the third withdrawal attempt by the OP, then they are on the right and this is just an attempt to scam a player using a cheap excuse.