How the Edge of Our Galaxy Defies Known Physics

I thought the scientific method was make a theory and test it against reality. If it fits the theory is right if it does not its faulty. Well when it comes to dark energy and dark matter. Its like the other way around. More like anti science. Reality does not fit our equations so insted of reworking them we invent something that cannot be seen or measured. Not saying you should stop looking. But its a good indicator that some well astablisched theroys arent that stable. How about changing some of the very basic paramiters. Like puting temperature after movment instead of the otherway around. That cold temperatures expand the space/time and makes light/matter seem to slow down when infact space is expanding. Im a victim of dunning/kruger I know. But creating bigger and bigger particle accelerators to look deeper into smaller things is like picking apart a radio trying to find the person who talks.