Lmao, not only is this scaling horrendous, you are using shinji from the arrancar arc comparing him to tybw shinji despite the fact we know shinji trains
That's a nice misconception. Shinji training doesn't change anything. A character being stronger than before ≠ becoming stronger than everyone who was stronger than them before. It's up to you to prove that Shinji's TYBW form surpasses Tosen and Komamura's Arrancar arc forms. The Komamura that Bambietta fought was the strongest Komamura form before his human form. It's unknown how much stronger that form was than the one that fought Tosen. You might think there wasn't much difference. Shinji, however, couldn't even withstand Bambietta's explosion as much as Komamura.
Even in CFYOW, Shinji considered activating his Hollow Mask when he felt Base Grimmjow's power. We're talking about Grimmjow, a character weaker than V1 Gerard.
Let's leave the Tosen scale aside. Bambietta is nowhere near V1 Gerard. You'd be scaling Shinji to V1 Gerard even though he lost to Bambietta.
This is an irrelevant argument, his durability feats and striking feats are multi solar in this platform, so the potency of his hakuda scales from there, nice try.
Another proof that Hakuda isn't close to Meninas' Zanpaktou AP is that CFYOW Zaraki is physically weaker than Meninas. We know that even SAFWY Zaraki is superior enough to cast Reiatsu Neg on Meninas. But the Narrator stated that Meninas was physically stronger. By "physical," I mean muscle strength. If, as you think, there wasn't much difference between Hakuda's and Ichibei's Zanpaktou power, then Meninas should have gained higher AP than Ichibei through Zaraki. But the same Meninas was matched against Girikko. Girikko also got one-shot by Zaraki in the Fullbring arc.
I think Aizen's SS section should be written as "Unknown" because he doesn't have a Hakuda feat. The same goes for Urahara.
There was no visible damage with shinji's either but you still haven't proved how his kido is superior to his zanpakuto.
Shinji's Zanpakuto doesn't have a Gerard-level feat. But his Kido was able to damage Gerard. It's up to you to prove that his Shikai can do the same. Gerard saying "that hurt" clearly confirms he took damage.
Aizen himself clearly state that Urahara had similar level of power to him before the hogyoku.
Aizen's reference to "Power" here isn't about AP... He's saying, "I'm now a superior being to the shinigami, while you're still a shinigami." The SS Arc Databook already describes Aizen as unmatched, confirming his far superiority over Urahara. If even his pre-Hogyoku form is unmatched, why would he consider Urahara his equal? Besides, he was able to fight Shikai Yamamoto, who is stronger than Urahara.
Urahara's shikai technique Hiasobi Benihime even dealt more damage to chrysalis Aizen than his Senju Koten Taio against a weaker version of Aizen.
The fact that several of Urahara's techniques can inflict damage on Aizen doesn't mean all his shikai attacks scale to that level. For example, the technique you mentioned isn't used against Askin or Ulquiorra, so it's fine. Those wouldn't scale to that attack, but Urahara's other shikai attacks wouldn't scale to this one either.
However, I doubt even that should scale. The databook states that these attacks aren't even at Aizen's level and he doesn't take any damage from them. It specifically mentions the scene where both Yoruichi and Urahara are subjected to this attack.