Yes. Surely you've heard of it.
You mean carbon dating or guessing age based upon layers of material..
That and far, far more.
Carbon dating is a technical way of guessing age because the assumed constant is not constant
Carbon dating does not "assume a constant". Make sure you understand it before you try to critique it.
nor is the variable proveable over time as to what it has been at any given time.
Ooookay. Can I have that again with a specific noun?
Nor does it consider saturation or contamination properly,
It does, actually. Check nearly any issue of the journal _Radiocarbon_.
it is impossible to know these things, thus rendering it a couple of guesses plugged into an equation rendering the outcome a processed guess.
No. Try again.
Layer dating isn't much more complicated nor is it any more accurate. Doesn't hurt my worldview; but, it really peaves some of you zealots.
The only thing that "peeves" some of us non-zealots is when people of unspecified zealotry demonstrate that they know little about a subject, and much of what they do know is incorrect, but they still feel qualified to declare the subject nonsense and all the people who *do* know much about it must be idiots or liars.
And you've failed to explain what is allegedly "wrong" with the 100+ other independent lines of evidence. Carbon-dating and stratification are minor players in the vast mountain of evidence for the age of Earth and various things in it, and the biological evolution of the life thereon.