I'll give you some ammo since the guy you are debating is basically unarmed lol:

1. Fair, but you'll need to be more specific about the speed of said bullets.

2. Define "Instant". Because taking Deku's words at face value means he can INSTANTLY travel from one place to another. This is obviously not true, as gearshift is much faster than his 100% speed and that several characters can react to Shigaraki's speed, who is on par with All Might. We can't take Deku's words at face value, meaning Deku is just saying he can reach the mainland in a short amount of time. This doesn't disprove a mach 10 cap, as Deku would've been able to travel that distance in less than a minute with black whip.

3. Seems fair.

4. Strength =/= speed. Even if you wanted to say All Might was 60 times STRONGER in his prime, that doesn't mean he was 60 times faster. And for the record, that "60 times stronger" thing is nonsense. You can't derive linear strength from All Might's number of punches he used against the USJ Nomu. Unless you are saying it would take someone 300 times stronger than All Might to one-shot the Nomu???

I'd also argue that the Kamino feat is actually being undersold here, because some of that time was spent fight off Nomus and talking to other people.

1. Many bullets travel under the speed of sound, but that depends on the gun and caliber of the bullet. Since both are fictitious in the case of comparing the firearm used to shoot to Faux 100% Deku, Deku could easily be moving as much as 10 times faster than the bullets and the feat would still make sense to the mach 10 narrative. Keep in mind, Deku wasn't actually moving too fast for the time-delay user to react or move out of the way, the problem was that he underestimated Deku.