Alright then, explain your vision for 145. How should things have been handled?

I looked at the saves from 141 to 144. It became clearer. The Dragon Utopia was only revealed on 144. Before that, the direction of movement indeed leaned toward the sandy treasure zone; after the Dragon Utopia was revealed, it truly could have been changed... But, excuse my bluntness, I feel Britvochka's skill level is somewhat exaggerated. I am saying this based on reviewing the same-turn replays, not just one specific save.
And as for 145 specifically, I would take the Dragon Utopia with Craig and return everything to Gurni, and then further to Pink and into his treasure zone.
Also, I wouldn't use a folder to take the Dragon Utopia in the underground if maphack is active.
Personally, the question is settled for me. Yes, there is suspicion, but I won't claim that there was cheating.