Why do we see much more matter than anti-matter?

Fig. 1, The Universe of anti-matter is on the left and matter on the right. Source: World Science Festival

Here is a hypothesis as to the answer to this question. It is so radical that I hesitate to publish it. But is fits the data of our studies of anti-matter so well that I feel I must put it out there. I would be very interested in learning about experiments that could prove it wrong, so I challenge all of you to prove it wrong. Figure 1 shows how this would manifest.