Not really, working class and peasants weren't synonyms. Peasnats had much less rights and there were two types of peasants, one was basically slaves, as they were not able to marry or move without permission of the landlord they were working for. Other part of peasants were more close to working class, and mostly were living in cities, but they still were lacking a lot of rights. I believe there only around 3-5% of working class and 80-85% of peasants during that time and rest were aristocracy, military or merchants.

For some reason those peasants in villages who had absolutely no rights are not called slaves, even thought they basically were them.

Later it started slowly to change and peasants were given their own pieces of land, which still was owned by landlord, but at least they had almost all they grown there for themselves now.

which is why their revolution was so successful.

That is not so much true as well, because revolution was aimed for bad workers.

In villages peasants who were good working and were able to have good harvests were called Kulak's, and they were attacked by people who were making revolution. In most cases those who came to rule were peasants who were not able to work properly. Later Kulak's were called any peasant who was not giving their last grain to new governemnt.

Later new wave of good working peasants appeared, but during Stalin they were destroyed completely and often put in prison or murdered. So only bad working peasants left who were working "because it needed" and not because they liked to work or know how to work. That led to huge drops in harvesting, as most people who knew what to do were in prison or murdered.