Baryon Asymmetry Problem

One of the biggest unsolved problems in physics is the Baryon Asymmetry (BA) problem. Why the Big Bang (BB) created more matter than antimatter?

I think the first question for BA really is, what was the mechanism of particle creation? I think the assumption in the world of physics, since the beginning of BB Theory, was Pair Production (PP).
But PP seems to be always creating matter-antimatter particle twins, so always equal amounts of matter and antimatter. Then what was the reason, the balance tipped towards the matter side?

But, is PP, the only possible mechanism of particle creation we know?

When an unstable matter/antimatter nucleus or particle decays, it also creates new particles and/or antiparticles, true? If true then, is not it possible, BB created new particles like an unstable particle decay event? If so then I think the most reasonable assumption would be, the whole universe was a single unstable (elementary) quantum particle at the beginning. (Or multiple particles? (Then most likely, an odd number of particles!))

If our universe began as a single unstable quantum particle suddenly decaying, what set of particles/antiparticles were the decay products then? Since our universe contains much more DM than matter, one of the decay products must be DM particles. I think we need to find out for certain (if possible), how DM/M ratio of our universe changed since the beginning. I think if the ratio was always constant, then it would mean DM and M particles were created with that ratio right in the beginning. And if amount of matter (vs DM), kept increasing since the beginning, then would mean DM was creating matter, since the beginning. (So it would also mean BB only created DM, initially.)

Clearly, each unstable nucleus/particle decay event, is like a very powerful explosion, at its own scale. So our universe beginning as a single unstable quantum particle decaying, would be definitely the mother/father of all explosions, thus truly deserving the name BB!
Which I think would also explain how/why the era of inflation (hyperfast expansion) happened, in the beginning times of our universe.

If our universe started as a single unstable (elementary) quantum particle, the biggest question would be this:
What were its properties? (All possible sets of quantum elementary particle state values for energy, wavelength/frequency, rest mass, spin, charge, color charge etc.)
Obviously the main constraint of the problem, is that the final result of the initial particle decay process, needs to be able to produce all DM/M of our known universe. (And I think that requires us, first considering how quantum properties of particle decay products, relate to quantum properties of the initial unstable particle that decayed.)

I think this maybe implying another constraint for the problem:
From Wikipedia:
"The presence of an electric dipole moment (EDM) in any fundamental particle would violate both parity (P) and time (T) symmetries. As such, an EDM would allow matter and antimatter to decay at different rates leading to a possible matter-antimatter asymmetry as observed today."
https://en.wikipedia.org/wiki/Baryon_asymmetry

See also:
https://en.wikipedia.org/wiki/Pair_production
https://en.wikipedia.org/wiki/Inflation_(cosmology)
https://en.wikipedia.org/wiki/Big_Bang
https://en.wikipedia.org/wiki/Dark_matter