Aghan debacle - A colossal failure of US and her poppies

On a query by one of my British friend as to what is the solution?
Solution to the problem of Afghanistan is,   just leave them alone. Let them decide what is good for them. Who gave US and her poppies the right to ravage a country savagely to avenge three thousand killed in 9/11 and we still don't have credible evidence who did it. His  answer was, who gave the right to Al Qaeda to attack US? My answer, AQ had no right. Where is the difference then? Should have sent your James Bonds to pick out AQ leadership and settle the issue with those rascals. In the end, few marines did the same, why not do it earlier why you guys had to make entire generation of Afghans suffer. Now leaving behind biometrics with the data of all those Afghani moles who sold their motherland for pennies, will make life hell for those poor people. All wrong political and strategic decisions and only poor  Afghans have to pay regardless of their ethnicities and religious inclinations. However, going back in time, in a unipolar world, with people like 'Dick' Cheney calling the preemptive shots, Americans (intoxicated by high of power) go out and kill millions with state-of-the-art weapons including daisy cutters. Spent 3 trillion in 2 decades just to get another three thousand of their own killed and handover Afghanistan back to owners of Afghanistan i.e. Taliban. Colossal failure. Now Taliban have USD 85 Bn worth US equipment. 75000 Vehicles, over 200 Aeroplanes including attack helicopters. 600,000 small arms. Taliban now have more Blackhawks than 85% of countries who bought it from US. Night vision goggles, body armour, biometric devices. Our (Pakistan's) past experience with US did make us wise. If US complained all these years to do more and couldn't get more out of us, we did the right thing. All this contains a lesson for friends of US, particularly Afghans who helped US occupation on their land and Indians, you will be left in the lurch. US will walk out any minute, it felt its interests are served or going nowhere, you will be abandoned to face the real world around you. Stop playing stooges of US or you will be left with excruciating screams coming from our Eastern borders.
Joe Biden may get a lot of stick for it, but this is the only right decision a US president took on Afghanistan in past 20 years.
Taliban may have the intent to form inclusive government and bring peace to their land. But due to geo-political importance of their country, Afghans can't have lasting peace which is evident from three bomb blasts on Kabul Airport this weekend. Let's hope now US doesn't go in circles by deploying more forces to avenge these attacks.ISIS or RAW or any other new stooge will emerge. Any stakeholder will pump in money to keep situation unstable particularly with important component of BRI running parallel to Eastern borders of Afghanistan.