The UA Losses project has confirmed 46 450 dead ukrainian soldiers since the 2022 invasion from open sources. 51 245 since 2014. The actual number is uknown but no doubt much higher.
This website presents statistics of documented Ukrainian losses during the war in Ukraine.
ualosses.org
Cumia is a fucking retard.
The Russian invasion of Ukraine is by far the best documented large scale conflict in history (so far). I don't have the the need or stomach to watch them, but there is an insane amount of videos of people and things getting blown up. Brutal POV trench warfare shit. Drone footage of bombed to shit towns and cities. Thousands of professional war reporters have covered the conflict in Ukraine and countless amateurs are covering it online using open sources.
It is all easily available. On the evening news on television, in the newspapers, on social media, everywhere. Like you said, he just doesn't want to. And moreover, he is so far gone he is posting about this publicly expecting praise and affirmation. He has completely lost it.