After doing some calculations, I found a model that leads to some of the same results as Special Relativity, specifically time dilation and the relativistic Doppler Effect, but that doesn't assume the same things.
In fact, in this model, the constant and equal speed of light in all reference frames is a conclusion, not a postulate.
I tried to ask my teachers for help, but obviously no one would touch this with a ten meter pole, and I understand that, but it is frustrating because they keep...