Thoughts on "Lenin's Testament"? Most information I can find on it is contradictory. The WiKKKipedia page is unhelpful as expected and I can't find much other discussion about it.
The whole fact there's a "debate" on whether it's real or not, when Stalin himself considered it real (he read it early) shows the latent cognitive dissonance of ideologues that cling to the ML label. It's that or they just pretend it doesn't exist, like that succdem S4A.
Lenin's observations on Stalin and Trotsky correlate with their historical actions. Trotsky was truly a bottom bitch for Lenin, skillfully commanding the red army and even arguing with Lenin when he made strategic errors, and this running theme that they openly hate each other is born from people cherry-picking small letters from Lenin, who writes purely in polemics. It ignores the fact that Lenin always had Trotsky handle the hard stuff. What idiots misunderstand is that having disagreements, doesn't mean they're going to kill each other. That's the best type of partnership, despite crashing out in private letters occasionally. It's practically Nietzche's star friendship. There is no reason to believe Lenin's analysis on Trotsky wasn't authentic when you recognize this.
Meanwhile, Stalin fucked up every military campaign he was a part of. This reached its apex during the Polish war (which Trotsky argued against, but Lenin overruled him). Stalin refused orders to send over troops which led directly a crushing loss, which then lead to him being relieved of his post. What Stalin was good at was kissing ass, which was evident from his centrist position during the left-right opposition or how he handled the testament. This is how he kept close with Lenin and one can assume that with his death nearing, and after the civil and polish wars, that Lenin started to recognize what Stalin was doing, and hence the warning. Someone else said basically the same but tried to undermine it by focusing on a specific insult (which is how they validate their views on Trotsky).
This isn't even an argument that Trotsky is perfect and Lenin critiques Trotsky in the same testament. If he theoretically won the power struggle, the international would have remained and he wouldn't have wasted a decade trying to court both nazi Germany and the allies, like Stalin did. It's about all the bullshit people spout about this writing which belongs with all the other consciously incorrect ideological platforms like the people living in Moscow trials era propaganda (that we know was fake) or stuff that's refuted by Stalin's own actions like the brief period Stalinists shilled the Comintern before promptly destroying it. Them claiming the testament is fake, or Lenin didn't "mean" it is just another symptom of their fixation on supporting Stalin as an edgelord move rather than any critical reasoning. That, and there's a youtube/forum pipeline that leads you to Stalin and to a lesser extent, Mao.