You said it yourself, the war didn't alter anything, but It did at least the give the Afghan people a chance not to be in that cycle if the Soviet Union won. I'm not making the argument that every single thing that happened during the intervention was right, the same way I don't argue that everything that Stalin did was 100% correct. But I don't have to argue that to say I support Stalin, nor do I have to argue it to say that the intervention itself wasn't a bad thing, especially when your argument equates Soviet and American interventionism, which is just wrong.

When it comes to the collapse, again, Stalin didn't do everything correctly, and the situation after the end of his leadership proves that. Then came revision, which led to the Sino-Soviet split, but also the failure of the Soviet leadership to adapt to new material conditions, which is especially stupid since the philosophy of Dialectical Materialism which they nominally espoused is literally based on changing material conditions.