"he wrote it because of stalins stupid behavior. He never doubted stalins ability. He also wasnt a great fan of trotsky anyway. And he wasnt in the best state of mind either, he was barely able to write or speak. Youu really cant use that against Stalin because of how incoherent lenin was at the time. "
Lenin WAS keen on Trotsky, both professionlly and personally. He was a friend of Lenin and his wife. Also, his abilities were trusted so much that Lenin gave him total independance on the Civil War (Trotsky occupied the post of Commissariat for War)
Also, even Lenin thought that Stalin was overly ruthless and heavy handed, for example, the Georgia affair.
I once was blind, now I can see