Afghanistan is destroyed because of American made Taliban not soviet invasion.
Syria is destroyed because of American made maniac jihadi thugs. Syrian people in territories under government control are living much better than territories under jihadis control.
You are confused.
The Taliban movement only became a significant force Years after the Soviets left Afghanistan,
and the U.S. did not maintain an interest after that.
Taliban got their support from Pakistan, if You ask me.
https://en.wikipedia.org/wiki/Taliban
If I read this correctly, it is true that the SA and US funded them against the Soviet Union but it was Zia-ul-Haq that went out to garner the support for them in the first place. Of course, the alternative would have been to not support them, and then you might well have been stuck with Russia in Afghanistan for the duration.
You would need to consider later developments to fully understand the evolving relationship between these players.
See above
Read again...
The Soviet Union left Afghanistan in 1989. With them went the U.S. interest.
The Taliban, according to the link emerged in the early 1990s.
The Taliban NEVER fought the Soviets.
At that time there was a civil war between the future Northern Alliance War Lords
and Gulbuddin Hekmyatar (or whatever)'s forces.
The Talibans, trained and supported by Pakistan cleaned out.
No WAY, the U.S. supplied the Talibans with any Stingers.
The U.S. supplied the Mujahedin with plenty.
Any unused inventory may have ended up in Taliban hands after the takeover.