In other news the universe is not symmetrical. For one there should be as much anti-matter as there is matter, according to the oh so wonderful theories. These people seek perfect mathematical models which leads them down wrong paths. The universe is not reducible to a “beautiful mathematical model”.
If anyone is interested they can get their feet wet on the subject by looking at some youtube videos by Sabine Hossenfelder on the subject.
Actually, there was, although not exactly 50/50. About a millisecond after the big bang, the majority of matter & antimatter mutually annihilated. The universe we know is the less than 1% of matter that remained.