Question: Did Stalin and Lenin have beef? If so, what about? Did Stalin really betray Lenin's ideas or is that not true? Please support your answers with evidence, quotes with sources, official documents, information on policies they endorsed (separately and/or together), etc. I'm trying to formulate my own position on this.
No but the soviet upper rank did have a bias against Lenin and saught to censor Lenins criticisms of Stalin by means of not delivering Lenins letters to parliment criticizing Stalin and warning against a cult of personality.
Lenin was bed bound and unable to leave care in the last year of his life, he spent it writing letters to parliment, most of which where 'lost' or not delivered, or censored by people looking to please Stalin, unknowingly to Stalin.
Id reccomend reading Lenins letters in the final year of his life, they are avilable.
Edit: Source https://www.marxists.org/history/etol/newspape/ni/vol02/no01/lenin.htm