Basudeba Mishra,
The present accepted models are the best so far available. When we say that these are incorrect, we have to propose a better model, and not simply point out the possible errors. We have nothing against the present theories, which are still incomplete. We try to complete it by making changes either very fundamental or just marginal; our aim is not deriding them, though sometimes we may use such words for emphasis.
When a galaxy moves towards us, the radiation from it is blue shifted; if it moves away, it is red-shifted. Again, when a radiation gets cooled, it is red-shifted; if it gets heated, it is blue-shifted. Thus there are two causes for blue/red shift. In an expanding universe, the radiations get cooled. So all radiations, including the ones that are initially blue shifted (due to the direction being towards us) are red-shifted. Naturally we observe some blue-shifted galaxies.
ΛCDM model is the present accepted model of the universe; however, I do not accept that model. My model does not require any dark energy or dark matter. In my model, expansion is due to actual motion of galaxy clusters; the clusters move away from a common center along spiraling paths at increasing speeds. The energy required comes from inside the clusters.
You say that the universe may be spinning, an alternate idea. The question is how far have you developed it. Is it just on the idea level or have you at least completed an overall model of that spinning? I just started from such a simple idea. My model from particles to universe is now complete in all respects in an overall way. I can explain most of the prominent phenomena; I expect the rest will also be explainable. Whether it is correct or not, I leave it to the scientific community to decide.
Jose p Koshy