I've proposed a modified gravity theory that you might be interested in taking a look at. If correct, it would answer a lot of these questions. You may look a

I've proposed a modified gravity theory that you might be interested in taking a look at. If correct, it would answer a lot of these questions. You may look at a pdf of it here: https://vixra.org/pdf/2203.0032v1.pdf https://vixra.org/pdf/2203.0032v1.pdf