I see how you intend to move forward. As such, I will be blunt.
You look down on others, calling them rookies, and you don't even seem to understand what a straw-man argument is. Here is the Merriam-Webster definition:
straw man; noun
1: a weak or imaginary opposition (such as an argument or adversary) set up only to be easily confuted
For being such a self reported top tear theorist, it's strange that you don't know this. As best I can figure, your "definition" of "to blame an irrelevant data point" is closest to what is called "irrelevant data," or "attribute blame."
For the record, you have also performed the fallacy of appealing to authority. (An argument from authority is a form of argument in which the opinion of an authority figure is used as evidence to support an argument.) Just saying that you have talked to other people, saying that YouTube is where the better theorists are, or telling us how great of a theorist you think you are, does not make your claims any more credible. In fact, swaying so easily into logical fallacies ultimately harms your credibility. Here, the strength of your argument is based on how you back it up, and how you react when people poke at it, not how many likes a video has. It's the content of the idea, not the platform it's on.
Honestly I've been refining my theory crafting skills for over a decade and at this point I haven't found anyone at or above my level which is part of why I want to see the theory community strive for more skill because its easier to improve when you have other people at or above your level to help you out.
This is only true in confrontational skills, where you need someone with greater skill, who can control the situation, to reduce the risk of harm. in more collaborative skills, one needs to learn to collaborate with all kinds of perspectives and skill levels. You and your friend can communicate the most complex ideas in an echo chamber, but if you don't learn to communicate outside of that chamber, your skills as a communicator will degrade. As the saying goes, you can't pour tea into a cup that is already full.
If you do see your theory work as adversarial, I see where my next point comes from. Your theory, at it's current state, as presented here, doesn't work, and it will never disprove any other theory, even if it is refined. First, the disproving aspect. Theories can disagree, and they can conflict, but no game theory can disprove any other game theory. Canonical information can disprove a theory, or more commonly make them unlikely. And, head-canon based on canon does not. This one point has been an issue from the moment you presented your theory to me. You have a theory. I have a theory. You say your theory disproves mine, yet even if a theory could disprove another, your theory says nothing valuable about mine. If you have any canonical information about my theory, that you say you disproved, feel free to post that canonical information here:
https://zeldadungeon.net/forum/threads/is-the-downfall-the-natural-timeline.70156/
Going forward, lets focuss on your theory, here.
I do think looking at time travel in the series from the point of view of anchor points is interesting, but it doesn't have the power of explanation you say it does. To use the analogy that seems to be your main anchoring source of evidence; an anchor may connect to a point in the river of time, but that does not tell us anything about the water, or the flow. I agree that we do have time travel anchoring points in the series, but you have done very little as far as explaining how they function, aside from saying that all time travel somehow seems to include them (even when there is no evidence of any anchoring, just a sending.), and saying that breaking an anchor point in the past is what creates timeline splits. You still haven't explained how the split between the Downfall and Adult timelines works under your theory, aside from;
One split is from time travel the other is not. What I told you before is that you need something to tie it in which is something I will provide if I'm questioned further on that point.
Does this mean that you want us to simply accept what you have provided, so far, as truth, before giving us some other part of your theory, that would have been important from the start? It doesn't work that way. You either have more to the theory, or you don't. Plus, I can see why you insist that it needs to be a break in the past, because other wise we would need a branch at Skyward Sword, from when Impa drops the mic. in Lanayru Desert. Not only does this bring us from a data set of two, to a data set of one, which has it's own problems, but it doesn't make any since why one would react to the flow of time any differently. The vast majority of time travel, aside from MM (evident by his constant returning to the exact time, with no passage of time from one trip and another), connects to a moving point in time. Time still flows forward in Young Link's time of OoT, as well as the portal of SS, and OoA, evedent by the fact that past events in the story still happened between trips. Combine that with how the flow of time does not care about directionality. (Yes, we have something called the arrow of time in our own universe, and it's still debated how that might even work, seeing how photons don't care which direction they are traveling through time.) When we have a truck pulling a tralor, it doesn't matter which side of the hitch breaks from, the truck or the trailor; they still drift apart. Just the same, it wouldn't matter which anchor is desterbed, the past or the future, the two flowing time periods go from beinng linked, to being disconnected.
To be anchored indicates that the connection is stable. It also suggests that it may be tied to location, but that has some metaphysical wiggle room, and is clearly false, so I'll let that go. The stability issue, though is where we need a better definition. We have some clearly stable connections, such as the SS time portals, and the pedistal location in OoT. on the other end of the spectrum are when Zelda sends Link back at the end of OoT, and Terrako's time manipulation in AoC, where it is a one off event that is self contained event. Some instances of time manipulation are more stable than others. If these anchors you talk about are not connected to physical location, or stability of the location, then it is really just a fancy way to say that the future can influince the past... which is just regular time travel.