From what I've understood, the basic motivation behind the idea of "the Theory of Everything" (its modern attempt being M theory) is to find a simple rule which unifies all phenomena observed in nature. Ideally, although this may not be possible, we would be able to calculate/derive all fundamental physical constants directly from it instead of determining their values experimentally. Setting aside the question of how feasible this is, what I'd like to know is the following: How is the Theory of Everything supposed to take into account the complete initial conditions of the universe? By "complete initial condition", I'm referring to the perfect description of the configuration of all particles/energy values. Wouldn't the Theory of Everything, supplemented with such a theory of initial conditions be exceedingly ugly?
Once again, by "complete initial condition" I'm not referring to the values of certain basic parameters (like entropy) but rather the detailed configuration of literally everything that exists.
Also, if no such account can be expected, how do we know that the initial conditions are uniquely determined by the physical laws? And if not, what's the point of having a Theory of Everything when it nevertheless unable to explain why the initial configuration was the way it was.
I'm not a physicist but am interested in such matters. Thank you in advance!