These organisms need to be able to go into their environment and find and process raw materials to both feed themselves and to use them to construct offspring. This is an extremely complex beast - far beyond the capabilities of man's current technology. When was the last time you saw, e.g. a photo-copier, go into the forest and cut down a tree and convert it into paper when it's hopper was empty? But this is simple! To match a single cell, on top of this, it needs to be able to source iron ore and convert it to steel, oil and convert it to plastic, beach sand and convert it to silicon semiconductors and so on, and then assemble it all into a new photo-copier! This is equivalent to what single cell organisms do.
Scientists are making preliminary attempts to replicate some of the functionality of a single cell, but it is proving extremely difficult!1
So, where did this first cell come from?
I had a bio-chemist as my High School Biology teacher who attempted to get us to learn the process - even the bit that she tried to drill into our brains was complex enough. How does such a brilliant and complex process arise simply by chance? The obvious answer is - it can't!
From years of experience as a design engineer, I know how difficult it is to get even a simple system to work, let alone a complex one. There is a reason they came up with the second law of thermodynamics - it basically says that things tend to fall apart, and you don't have to be around the real world very long to see that in operation! Evolutionists seem to live in a theoretical world where the opposite is true, they think that somehow, given the right length of time, things that don't happen will. It defies common sense.
References:
1. Science's awesome challenge: Creating artificial life
2. Scientists seek to make energy as plants do