It's misleading to point to a modern cell as evidence of how complex the first cells were.
What would cause you to characterize a cell as modern?
Here's what experts say about the cell:
Dr. Denton, who has a Ph. D. in biochemistry, asserts that the basic design of the cell system is essentially the same in all living systems, from the humblest bacterium to the largest mammal. (Evolution: A Theory in Crisis, 1985). As a consequence, according to Denton, there is no such thing as a primitive cell that is ancestral to any other cell system. He argues, then, that there is not the lightest empirical hint of an evolutionary sequence from one form of life to another. Nobel Prize laureate Jacques Monod agrees with Denton’s findings. “The simplest living system, the bacterial cell,” he writes, “in its overall chemical plan is the same as that of all other living beings. It employs the same genetic code and the same mechanism of translation as do, for example, human cells.”
A single living cell contains something in the order of 100 million proteins of 20,000 different types. Despite this fantastic degree of complexity and diversity, a few hundred of the cells could fit on the dot of this letter “i”. And there is no scientific evidence that the living cell “evolved”. And yet, it is the prototype, the common factor of all the cells contained in the the broad spectrum of the plant and animal kingdoms. How did self-replicating organisms come into being in the first place? On this question, science draws a blank, though scientists themselves are prodigal with "just so" theories.
The idea of a modern cell or a primitive cell is not supported by science. It is however supported by your own confirmation bias.