I hate to break it to you, but the problem is with the russian filter and not an issue with cloudflare. Just be glad that they haven’t outright blocked cloudflare, staminus, incapsula, and stop-ddos yet – which they were considering doing earlier this year.
The only way that this could be resolved and prevented from happening again in the future would be for garry to:
A. Stop using cloudflare, which will almost certainly not happen
B. Apply for his own ASN to get a /24 and then pay cloudflare thousands of dollars a month to announce his own IP block, which is so unlikely to happen that I would pretty much call it impossible.