So, they'll support crow-barring the weakest, less talented and less intelligent people into postions for which they aren't at all suited, while excluding the people who are. Yet, at the same exact time, they'll fanatically embrace the idea that the strongest should survive, while the weakest should make way.
No, they do not embrace this idea at all. And neither does Darwin's theory.
Ignoring the fact that Darwin speaks of "fittest", not "strongest", which in this context is irrelevant as your choice of words correctly implies (and so I will use "strongest" for "fittest" below), Darwin's theory says that the strongest _will_ survive, not _should_.
Liberal policies react to the fact that without intervention the strongest will survive, while according to liberal ideology, the weakest should have the same good life.
Liberals here differentiate between nature and morality. They say that even though they KNOW and understand that in nature only the strongest will survive, they BELIEVE that the weakest should be favoured by the system just as much. This is not hypocritical at all, it is merely what morality is about.
It's like recognising that a lion WILL eat the prey but that we might want to BELIEVE that we should help a helpless human child about to be eaten by the lion. When we save the child it doesn't mean we are hypocritical just because we also recognise the fact that without our help the child would have been eaten.
NATURE: Only the strongest survive.
HUMANITY: We can help the weakest.
NATURE: Metal does not fly.
HUMANITY: We can build aircraft and make it fly.
NATURE: Lions eat human children.
HUMANITY: We can interfere and shoot such a lion before he eats the child.
In fact, they'll move Heaven and Earth to teach that theory to children as undisputable scientific fact, even though it's full of enormous holes and creates its own, unanswerable questions. Which is why, even after 150 years, it's still called the "Theory" of Evolution.
Darwin's theory is indisputable scientific fact. It is right that they should teach it as such. There are no "enormous holes", which is why you will find that only those people see those alleged holes who don't understand Darwin's theory (or what a "theory" is).
You won't find biologists like Richard Dawkins speak of "enourmous holes". The reason is not that he is trying to cover them up, it's simply that he understand Darwin's theory and hence doesn't see the holes which don't exist.
It's easy to see holes in a theory one doesn't understand. Most people who see those "holes" still don't understand what a species is and why there are no "species borders" that could possibly be crossed or not crossed.
And yes, it's obviously still called the "theory". What else would you call it? It's a theory, like the theory of relativity and the theory of gravity or any other scientific theory. It is also fact. You misunderstand the term. A scientific theory is an explanation for facts. It doesn't matter how often it is verified and shown to be fact, it still remains a theory forever or until someone finds evidence that it isn't true after all. If you think that not believing that humans evolved from the same ancestor as apes is a "hole", think again. Because Darwin's theory explains the mechanism by which it happened and unless you find evidence that it cannot have happened, you haven't found a hole at all. (And again, claiming that "species borders" cannot be crossed is not a hole either, because there are no "species borders" in Darwin's theory or on nature. Species branch, they do not border.)
Merely stating that there are "holes" in a theory one doesn't understand (and doesn't want to learn about) isn't enough to demote a theory. And there is also no level beyond "theory" that a "theory" could become. In science a "theory" is the highest level that can be reached.
If you want to doubt a theory, doubt gravity. There is a hole in the theory of gravity. For example, if matter attracts matter, why do gas molecules not fall to the floor but instead fly around the room? Why do gas molecules not attract each other? The theory of gravity is not perfect and scientists are looking for a better theory.
But there hasn't been such a challenge found for Darwin's theory yet. And again, challenges made up by people who don't know what Darwin's theory says do not count.
You don't find that the least bit hypocritical?
No. As I said, I find your understand of Darwin's theory wanting. But the idea that even though recognising that nature does X it is possibly for humans to promote the opposite -X is not hypocritical at all, even though I disagree with liberals on the usefulness of going against nature in this case.
An airline pilot who flies an aircraft heavier than air through the skies is not a hypocrite when he acknowledges that without propulsion of some kind the same aircraft would drop to the earth as the theory of gravity would predict and would be an idiot if he decided not to teach children in schools that it would.
And a liberal who advocates a social welfare state is not a hypocrite when he acknowledges that without a welfare state the weakest would be the losers and he would be an idiot indeed if he decided not to teach children in schools that that is the case.