In normal circumstances I could not disagree with your view.
Putin is far from normal. Not a politician. Not even a Russian politician.
He is and was a Russian spy-master and it does not matter which brand (KGB or otherwise) you label him with.
Ingrained in his make-up and at the foundation of the man, is the profound ability to analyse how best he can usurp and disrupt.
In domestic politics in Russia where murderously, he has vested a Presidency on himself for life.
In international politics and equally murderously he applies his skillset without compunction or compassion. Only his enemies die and only they pay the price of opposing him.
Could it be possible that in line with a long held Russian practice of spotting candidates young and grooming them to your needs and training them to deliver your ends, he has has fortuitously had a number of candidates emerge all at once? So why not Johnson and Corbyn emerging from their cocoons at the same time. And causing division within the country beyond what we could have been comprehended as being possible.
I laughed out loud at the suggestion that the aristocratic Bullingham Club was a recruiting ground - but then Oxford has been a recruiting sergeant-major's dream patch for some time. And hedonistic members are no longer troubled by being recruited by a Russia that no longer is communist.
Confirmed accounts of drug taking, criminal activities and lack of moral compass (and ascribable activities worse than I describe here) made at least two of these Buller boys malleable to any amount of blackmailing pressures.
So not quite so black and white as to be able to say we cannot put Putin in the frame. Perhaps he has usurped our nations' security without launching a missile.
We will never really know in our time - but how the hell did we get into the mess these guys (and gal) have made of it?
Did they do it on their own - or to someone else's design - and money?