There's no 'allegedly ' about it - the self-incriminating statements are there for all to see in Wiggins's book and interview utterances. You just have to realise and understand what you're reading and hearing, which you appear not to, given your difficulty with such fundamental matters as comprehending the difference between failing to find evidence and evidence not existing or proving innocence.
Whilst your desperation to cling to the belief that Wiggins won everything all fair and square is amusing, I have no need or inclination to try to convince you, or anyone, otherwise - you asked what Wiggins had done wrong and I told you. If you opt to persist in your delusion it makes no difference to me. The main thing from all this is that the select committee saw through the elaborate deception, manipulation and obstruction perpetrated by Sky and is aiming to use its findings for the improvement of sports governance, management and administration in the future. And the ethics credentials of the individuals on the committee aren't of any real significance here - the report and any future developments arising from it will be subject to plenty of scrutiny in many quarters to ensure that.
Trying to sanction Wiggins and Sky/others isn't really an especially important outcome of this process or the current furore - enough people know and understand what went on and what now needs to be done, at least in broad terms, to reduce the opportunity for fraudulent and unwarranted TUE applications to be used as a method to get sportspeople pumped full of performance-enhancing drugs when they need to perform better.
A reasonably just outcome is that Wiggins, Brailsford and Sky are suffering the loss of reputation they deserve. They took a major, highly unethical gamble and lost, although they may have 'won' some races and gained plenty of publicity for the Murdoch machine along the way. Thankfully in the minds of a considerable proportion of the population, those 'wins' will be accompanied with asterisks (real or virtual) that assign a 'won using performance-enhancing drugs' qualification/caveat to the roll of 'honour'. The perpetrators will keep their millions, and be comfortable for the rest of their lives, so they should really just suck it up and go away.