Of course, everything except that last point has been confirmed to be true! We’ve created quark-gluon plasmas in the lab; we’ve created matter-antimatter pairs; we’ve done the calculations for which light elements should form and in what abundances during the early stages of the Universe, made the measurements, and found that they match with the Big Bang’s predictions. Coming forward even farther, we’ve measured the fluctuations in the cosmic microwave background and seen how gravitationally bound structures like stars and galaxies form and grow. Everywhere we look, we find a tremendous agreement between theory and observation. The Big Bang looks like a winner.
Except, that is, in a few regards. Three specific things you would expect from the Big Bang didn’t happen.