Admiral fans making fun of Teenage HKs not being strong is some clown shit. An older Kuzan was literally begging Garp to teach him Haki
and does anyone reallly think young Kizaru or Fujitora would be some naturak born monster?
Only way you end up that strong as a teenager is:
1. Winning the genetic lottery (Loki, Kaido, Linlin)
2. Being forced to trained at a young age (Garp throwing Luffy in the jungle, Oden)
3. Having a ridiculous Will to challenge the current system (Koby, Roger, Garp, Dragon).
Honestly, now that I think about it, Garp's ridiculous treatment of Luffy probably entirely stems from him thinking he wasn't hard enough on Dragon.
If you don't have one of those three factors, you're not making it into the top tiers until you're in your 30s, at the least. This is consistent with most characters.
Even Newgate wasn't a true Top Tier on God Valley, yet, and he was, what, in his mid 30s?
People looking for powerscaling in a chapter where there is absolutely nothing to powerscale is FUCKING HILARIOUS, it's like trying to make Baked Alaska out of a rabbit and a shoestring.