As for the original topic question, Lenin appears to have been an example of what happens when some well-meaning person with an education and not much practical experience tries to force people against their will to adopt some "Utopian" scheme that looks good on paper, but doesn't survive contact with reality.
The concept of "Communism", where each individual contributes according to their abilities and receives according to their needs, functions fairly well in a small closed society where just about everyone knows everyone else, and peer pressure keeps people from lying about their abilities and needs. Once you get beyond the size where you start having "strangers" in your midst (200-500 people), it becomes necessary to enforce the division of labor and the distribution of wealth through selected individual representatives, who therefore become "rulers", and you no longer have "Communism", but some form of dictatorship. While "nearly perfect" for a small hunter-gatherer tribe, it simply doesn't function "as advertised" in a large industrial and mobile society.
When it became evident that the public was not going to stand for it willingly, and that some of the basic underlying principles needed to be re-thought, Lenin chose to use force to make people accept it ("until they're ready for it"), rather than consider that perhaps he may have neglected to consider a few small details about the practicality of his ideas. His ideas weren't necessarily "evil", but his decision to force them on others by violence, if "necessary", definitely crossed the line.