Theres always explanation for Denisenko... I was a fan of his in 2017 and 2018, but the big caveat was that he didnt produce. Four years later, hes still not producing. At some point, you have to produce and cant always have excuses. The same will apply to Podkolzin, I feel.
I get your point, but at the same time I think you're overstating his lack of production.
His draft-1 year was very good (only Kravstov, Marchenko and Yevgeni Groshev produced more from Denisenko's draft year).
Draft year was somewhat weaker production-wise, though not awful - in the MHL, 10 kids from his draft year and 3 kids from the 2019 draft year (one of them Dorofeyev) had better .ppg pace than him. Not great, especially since there was no production improvement from the previous year... OTOH, I'd estimate there were roughly 200 forwards from Denisenko's draft year or younger who played at least 20 MHL games. Having the 14th best .ppg pace out that group doesn't scream "NHL star", but I wouldn't call it a bad season either.
His draft+1 year was fine for an 18 year old undersized kid bouncing between KHL/VHL/MHL. Not oh-he's-outproducing-everyone, but pretty much exactly what you'd expect from an undersized prospect his age in the KHL. Only Kravstov had better .ppg pace from Denisenko's draft year or younger, though obviously the sample size there is crap (there were only 8 forwards who played at least 15 KHL games last year who were from Denisenko's draft year, plus Dorofeyev as the only younger forward) - but that alone tells you that looking at production here is essentially meaningless.
Now this year will be key, and I really want to see some improvement on the actual scoresheet from him. At the same time... it's October. He also has one goal on 26 shots - odds are his shooting% should improve as the season goes (and if he had only two more goals which would mean shooting success of 11.5%, he'd have 6 points in 15 games, good for a .ppg pace of 0.40, and we're likely not having this conversation at all). His shots per game are up, his PIM are way down from last year (which is good, given his past disciplinary issues)...
I won't say I'm not concerned at all, but it's far from the stage where I see him as a likely bust and give up.