Big Bang theory is not valid.

[theVOID]

Once again of course BB came before Dark energy, dark energy was never needed before the issues arose around the BB theory now all of a sudden we apparently have dark energy ..... don't get me started on red shifts because that too has it's problems.

Please, explain to me in your own words what you think the concept of 'dark energy' is about and why it was proposed.

The "age" of the Universe keeps being proposed according to the BB theory as its base platform on when to start judging it.

No, the age of the universe is proposed due to the observations about spatial expansion and the reversibility of physical law, we can use GR to predict prior states in a system given that which has come later, due to the rigidity of GR and it's astounding accuracy we can form a rather detailed picture about the history of the cosmos, all of which points to a period of rapid inflation from a spatially small region.

My issue is this it currently is being based on the observable universe and has several times been altered to fit with new discoveries i.e we now arrive at post dark energy era, however it has been raised that the probability of the Universe being larger than we suspect (a lot larger) is problematic for the BB model.

That's the ENTIRE POINT of doing science.

Initial Belief + New Data -> Improved Belief.

If the Universe is nigh on infinite then it is impossible for a singular point of creation simply because it cannot be possible that in 14 billion years the entire universe was created ..... simply its far to big.

1. We have no evidence that the universe is spatially infinite.
2. Show me the math that proves that the universe is "too big" to have expanded to it's current size in 14 billion years.