[genman]

The goal of the provisional government was to lead Russia to become a democratic and free country, not a dictatorship of genocidal madmen. The end goal of it was a fully legitimate government and this was destroyed by bolsheviks who took over the control and murdered everybody who opposed them and was not able to escape.

[GrigoriyMikh]

When you talking about "destroyed by bolsheviks" -- it was tens of thousands of people who participated in revolution directly. There obviously were reasons why so much people decided to go to such measures to overthrow the government.

Specifically, because provisional government couldn't get to a peaceful consensus that would satisfied both sides. Old elites didn't want to give they privileges away. So people took it. Good lesson to modern elites.

[genman]

Bolsheviks were great manipulators of people.They promised what people wanted to ear, something they never planned to keep, their actual goals were very different. When they solidified their power, they eliminated the other political actors who helped them. They deceived people to participate.

But you are right, in the end the opposition to Bolsheviks failed because the only serious opposition to them was tsarist who could not provide any new ideas. Bolsheviks killed (and very literally) any change of real opposition to them. When people realized the actual situation then it was already too late.