Bin Laden might be even too young to play prominent role in 1980s. But the help went to the forces which later were associated with bin Laden.
Again, no.
After the Soviets were kicked out of Afghanistan, those we had supported attempted, and failed to run the country.
In reaction, a group, either funded by Pakistan, or made up of devout Muslim religious students, depending on who you want to believe (and probably both) set about bringing law and order to the anarchy around them.
They brought rather alot more then that, as these fighters were the Taliban.
Within a few years that had taken over most of the country. The leader of the opposition to the Taliban was a man named Ahmad Shah Masood.
Masood had been perhaps the most important of the Afghan mujahadeen fighting the Soviets, and was a key American ally.
Shortly before the 9/11 attack, AQ assassinated Masood. Had they not done so, he would today be at least returned to his role as the defense minister of Afghanistan which he had held between the fall of the Soviets and the rise of the Taliban.
One can criticize Clinton and Bush 41 for allowing our former allies to fail in Afghanistan, and then (the latter)doing nothing about he rise of the Taliban, but frankly that is nothing more then a ridiculous use of 20/20 hindsight.
As for your notion that the US helped the Taliban and AQ, well, such an absurd notion should be left for the tinfoil hat brigades within the fever swamp of the far left.
We did not take advantage of the moment of Taliban to send them Hillary, Boxer, and the rest of our feminazi sent to Afghanistan on a fact-finding tour to be kidnapped and disposed of by Taliban in colorful ways like their disposuition of Najibullah. Too late now. So sad.
Karzai is superior to Taliban which cooperated in 9/11. Our Pentagon, World Trade Center and four airliners destroyed by Islamofascisti with their taste for American blood whetted by the internationalist cowardice (how does it differ in results from isolationist cowardice? Not at all) of Clan Clinton who cared far more for service in the oval office than for human freedom. Paleos would have busied themselves getting sloshed on wine while whimpering the poetry of the lost generation after WWI who were just bereft over the loss of social opportunities represented by the bodies on Flanders Fields.
If something better than Karzai (from the point of view of American interests) comes along, we can help. Hopefully we will.