We watch a vastly different amount of videos online I guess. I was thinking 10 or 20 people at most. But even with 100 people, if somehow you wanted to donate to every single person, the solution is simply to donate yearly rather than monthly. (Seriously tho, not judging your lifestyle, but 100 channels? That's a lot)

You are making a lot of assumptions with your argument.

In your current model, a considerable share of your subscription money goes to the platform (in this case, Alphabet), rather than directly to creators. While this is indeed a reality of the current system, that doesn't mean it is the most effective way to support creators, and it is this point that the suggested model seeks to challenge. Direct contributions, even if smaller in size, have a larger portion reaching the creators.

Also, your argument assumes that you donate an equal share of revenue to every creator, but that doesn't always make sense. You have the Power of Choice: In the current model, you pay your subscription fee and have little say over how it is distributed. In a direct donation model, you have a greater ability to vote with your wallet, supporting the creators who you feel truly deserve your support.

I’m certain that you don’t actually follow your own advice because it’s quite clearly impossible for a normal person to internationally distribute $12 among dozens of strangers.

No, I don't, I donate more than that, and most of the time without third party platforms that take their cut, but look I agree, it's not practical for every individual to distribute $12 among dozens of creators around the world. But, if a significant number of people were to adopt this approach, the collective impact could indeed be substantial.

Also, patreon and similar platforms are only used for convenience, and are not the end all be all, for instance liberapay takes no fees (with the exception of the processing fees that are charged by the payment processor).