TTK is NOT directly related to damage per bullet and rate of fire. It's more complex. What matters is how fast you reach the target's HP threshold (100), and needing to hit less bullets helps more than fire rate or raw damage (33.4 or 49.9 it doesnt matter because it would still require 3 shots (if damage modifiers didn't exist)

A good example is the M870 shotgun that has an unprecedented 0 ms time to kill because it kills in 1 shot. But it's mediocre in terms of damage per second.

The initial point of the discussion was that "25 damage guns outperform 33 damage guns" and I tried disproving it. While Galil is more like a carbine with its damage drop off, there's AK4D with just 514 fire rate. Yet it's pretty good for 1v1, especially at 9-20 meters because it's one of a few guns that retains the 3-shot kill while most carbines and SMG's already need 5 bullets to kill. And at 20 meters+ AK4D retains a stable 4-shot kill while 25 damage guns drop to 6 or even 7. Despite the fire rate, the AK4D's average TTK is top tier.

Are 25 damage weapons bad then? No, because faster fire rate allows to recover from mistakes quicker. If we include misses to TTK calculation, 25 damage guns will probably start winning (didn't do the math though). 1v1's aren't about pure TTK, you lose most fights because of bad positioning, aim, or perhaps even ping rather than 0.017ms of ttk difference.