No one said anything about faith. We have 3.6-3.8 billion year old fossil microbes. They existed - no faith. The fact that they no longer exist does not make them less real, just as the fact that Tyrannosaurus no longer exists makes it any less real. I also understand evolutionary processes and a 3.5 billion year old bug wouldn't stand a chance in today's more highly evolved and more highly competitive environments. Not to mention that the environments of today are much changed from those of 3.5 billion years ago.
Since we don't know the details of a 3.5 billion year old bug, your point as to the complexity of single celled bugs is meaningless. You may be right, but IMHO you are most likely wrong.
So it is on faith. As I said, you have no proof.
What you are telling me is beside the point anyway. Evolution theory is based on the proposed increase in complexity of known organisms over time as evidenced by the fossil record. Yet the most advanced multi-celled org. known is far less complex in its additional design than the basics of cellular biology.
It seems counterintuitive to the "simple to complex" view that the latest designs contain nothing in them, structurally or functionally, that comes anywhere near the fantastic complexity of basic cellular function.