Herd Instinct is so applicable to the reactions of peer reviewers to any challenge of the standard model of any science. Because of this attitude progress to accuracy is delayed for 20 years or more. A recent example is the refusal to believe in tectonic plates ultimately now accepted. This sort of thing has occurred in all the sciences including Medical.
At the moment I am promoting New Gravity. I worked this out in 1987 and in 1995 was asked to present my paper “ Much ado about nothing” to the Royal  Society.  The eventual  response was “ There was nothing new in it and what was new was wrong. No further correspondence would be had and no record of it would be kept . I had expected to be disappointed but, expected details of why and where it was wrong. I wondered if I had ruffled feathers by my impatience in asking what was happening to their conclusions.
Since the acceptance of Big Bang theory there has been progress in realising that the Universe is largely empty space plus a tiny amount, relatively , of energy. Thus the universe is built from what was always considered to be nothing at all !  Now we know that everything is engineered from energy and space shepherded by gravity including all the other forces. Newton’s Gravity is a direct pull on space not an attraction between masses.
Once Newton Gravity is accepted, Dark Matter, Dark Energy, Dark Forces are redundant.
The faster and faster expansion of the universe is revealed as the stubborn misreading of the redshift of light.Gravity is the cause. Every emitter of light is also exerting the pull of gravity against the progress of light.The  greater the travel the greater the redshift.
Galaxies do not fly apart because streams of space head to every particle thus creating rivers of space in which any mass flows, like a swimmer entering a river it goes with the flow and needs no individual attraction.
The cosmic microwave background radiation is likely a manifestation of space moved by gravity, certainly gravity comes from all directions.Black Holes are part of a galaxy, created by the gravity of the galaxy criss crossing from all over the galaxy and thereby roiling any  star  or object in the centre. Supermassive Black Holes have dense stars closer to the centre and so receive  a greater percentage of gravity.