A story told by a single, wounded, ordinary soldier participating in one battle of the war as a proof of generalized description of the war tendencies. I have no more question.
Btw the article you qute never mentions Lughanks or Donetsk militia being able to inflict such losses, but it clearly states that Ukrainians telling the story were fresh recruits with no previous military experience and that they were fighting top Russia military units. So mush for your "proof".
Dispute the soldiers story, any of it.
Disprove or refute these, as well.
‘In Ukraine’s South, Fierce Fighting and Deadly Costs’
https://archive.ph/MtHyd#selection-383.0-383.52
‘Wounded Ukrainian soldiers reveal steep toll of Kherson offensive’
https://www.washingtonpost.com/world/2022/09/07/ukraine-kherson-offensive-casualties-ammunition/
‘Ukrainian general estimates Kiev’s losses at hundreds of thousands since Feb’
https://tass.com/politics/1501881
“Ukraine war veterans on how Kiev plundered US aid, wasted soldiers, endangered civilians, and lost the war”
https://thegrayzone.com/2022/08/18/ukraine-veterans-us-aid-soldiers-war/
“A Ukrainian’s Letter from the Front
https://www.youtube.com/watch?v=94RYVNg9bfA