That's because the "basic cell" does not appear to be created or designed. Your ignorance and incredulity of evolution is not evidence that it is untrue.
Just for once you could say that it's still a mysterious and unidentified subject.
Again and again, can't you compare that basic cell to everything that existed afterward, take a look over the whole picture; on land, air and deep under the sea.
Obviously, both of us have a totally different kind of glasses to see through it.
Nothing in science is 100% certain. Having said that, evolution is as certain as ANYTHING else in science. More certain than gravity, in fact.
That is a point of agreement, and btw I'm not completely denying the whole evolution process either, except that I've a major and critical disagreements and would especially insist that the human was created as a human from the start in the best possible shape, while striking a great balance in his abilities, in comparison to everything else that did exist.
BECAUSE THEY DO NOT HAVE ANY EVIDENCE.
Well, it seems that scientists are willing to spend their lives while researching, analyzing, then presenting their hypothesis and theories about the life creation since billions of years ago. Or else, someone had spent 17-years studying a skeleton that considered to be dead since four-million-years ago.
However, and strangely enough, it looks like nobody of them is willing to investigate the truth and credibility about what might be considered a religious fiction. For example, the story of an infant which was born miraculously only since 2015-years ago. He spoke clearly while he was still infant; had the ability to cure the diseased, resurrect the dead and possessed some knowledge of the unseen. For which, it wasn't so long until he was considered a god by some people and have been worshipped ever since then.
I wonder, why such a claim wouldn't be investigated with same level of care and attention.
You're just arguing from your own incredulity. "I can't imagine how this could've happened without a magical god, so therefore there must be a magical god."
Your argument says more about your own ignorance than it does any putative deity.
In another way, the theory doesn't provide reasonable explanation yet over some aspects of life creation.
Evolution does not predict that all organisms will develop identical eyes. In fact it rather predicts that they will develop eyes suited to their environments, and guess what we observe?
I thought it's either land, sea, air, or otherwise a hyper environment that the life was originated from. Guess how many kinds we do currently have of each and every organism category out there. Diversity for the sake of diversity, Mother Nature?
And that brings back my previous, and such a key argument point, why it was only one fully-intelligent we've observed from such diversity and long evolution process.
Please, just look over all the wars, destruction and misery the human has brought upon both, himself and the environment, and imagine for a second how it would be if we lived alongside another similarly intelligent species.
Just a lucky outcome of that evolution process, not a slightest hint of intentional design whatsoever?
Besides, looking back into circumstances surrounding the life of primitive humans, would you please explain why we never adapted an ability to fly? It was a must feature I guess; the quick ability to look for food and water, it was a much needed ability to save them torturous travel times.
How about a Wolverine-like weapon to defend themselves against Dinosaurs?
And since those who settled and lived nearby a sea since very long time, but still can't swim any better than those who been around the desert since Abraham days. Wasn't fishing part of their daily life.
Speaking of deserts, would that theory also explain why camels has that incredible ability to survive thirst for weeks, while Bedouin almost has the same exact enduring ability against thirst, compared to those who settled in the far northern regions around rivers.
Some serious consideration and thoughtful look is needed beside scientific mindset, whether now or long after, I think it's worth it.