Essentially, you're just making stuff up. How do you suppose that something can go from unconscious dead matter to conscious living matter? Just to say that chemicals reach a state of critical mass does not explain anything. It's just a silly idea that equates to driving a square peg into a round hole to make things make sense. They don't 'make sense' because nature itself is not rational. But the rational mind thinks it can explain away everything. Instead it ends up in paradox, and then dismisses it by making up convenient 'explanations', such as 'Emergent Theory'.
I agree that we don't completely understand the process. We know a lot more about life than consciousness in this regard, partly because there are usable definitions of 'life'.
So, some of the essentials of life are reproduction, growth, and maintenance of internal state. Nothing in this list requires anything other than the atoms that make up our bodies. And those atoms are NOT alive. SO, yes, living things are made of 'dead' matter (I prefer to say non-living matter).
As for consciousness, there are clearly some definitional problems. Any definition of the concept that makes a rock conscious is clearly wrong in my mind though. Consciousness requires the information processing of the complexity that happens in brains. Now, do all brains produce consciousness? I don't know. I guess not. Are insects conscious? That may well be a matter of definition. But at least humans are conscious. Most mammals seem to be conscious. Birds also seem to be. I'm not sure about fish, for example. And I am pretty sure jelly fish are not.
You see what I am doing? I am outlining examples of a phenomenon I want to characterize and study. I don't assume there is a previous concept that is understood by all. Instread, I give examples and possible borderline cases and seek a definition that fits those criteria.
From what I can see, all conscious things so far are living things. The converse is probably false, though. Life is easier to achieve than consciousness. I allow for complex computer systems to be conscious though. They seem to have the right type of information processing capabilities.
But in all cases, life and consciousness are properties of physical systems made out of non-living and non-conscious components.