To elaborate, using Subsonic reaction or attack speed times for characters in general leads to very inflated results
and is considered calc stacking, let alone
Transonic, which is 9 times higher than Subsonic. Also using 1/220 FPS reaction speed for "peak human" is generally exaggerated since we cannot necessarily react at those speeds and
using our peak human reactions of 0.1/0.08 seconds is better. In itself this kinda ruins the Unconscious Zenitsu, Tanjiro Dodge and Muzan Blitz feats.
The Tanjiro dodge also has another issue in that it assumes Tanjiro moved by 24 cm before the demon could cross the distance between his fingers and his eye, which clearly isn't the case as its arms have already moved 30/40 cm in the same panel.
The lightning statements IMO aren't solid enough to actually give MHS+ speeds.
This only leaves the fish feat which I can't really evaluate since a lot of the scans are broken, but generally I agree that slashing 10000 times to kill 10000 fish is a bit silly, but that's to be seen.
Regardless let's focus on AP for now.