He literally talks about how he doesn't want to have power and tried to step down in that speech.

It is said that in that "will" Comrade Lenin suggested to the congress that in view of Stalin's "rudeness" it should consider the question of putting another comrade in Stalin's place as General Secretary. That is quite true. Yes, comrades, I am rude to those who grossly and perfidiously wreck and split the Party. I have never concealed this and do not conceal it now. Perhaps some mildness is needed in the treatment of splitters, but I am a bad hand at that. At the very first meeting of the plenum of the Central Committee after the Thirteenth Congress I asked the plenum of the Central Committee to release me from my duties as General Secretary. The congress itself discussed this question. It was discussed by each delegation separately, and all the delegations unanimously, including Trotsky, Kamenev and Zinoviev, obliged Stalin to remain at his post.

What could I do? Desert my post? That is not in my nature; I have never deserted any post, and I have no right to do so, for that would be desertion. As I have already said before, I am not a free agent, and when the Party imposes an obligation upon me, I must obey.

A year later I again put in a request to the plenum to release me, but I was again obliged to remain at my post.

He also talks about how he gave Trotsky more slack than most people wanted.

At the last plenum of the Central Committee and Central Control Commission, held in August this year, some members of the plenum rebuked me for being too mild with Trotsky and Zinoviev, for advising the plenum against the immediate expulsion of Trotsky and Zinoviev from the Central Committee. (Voices from the audience: "That's right, and we rebuke you now.") Perhaps I was too kind then and made a mistake in proposing that a milder line be adopted towards Trotsky and Zinoviev. (Voices: "Quite right!" Comrade Petrovsky: "Quite right. We shall always rebuke you for a rotten 'piece of string'!") But now, comrades, after what we have gone through during these three months, after the opposition has broken the promise to dissolve its faction that it made in its special "declaration" of August 8, thereby deceiving the Party once again, after all this, there can be no more room at all for mildness. We must now step into the front rank with those comrades who are demanding that Trotsky and Zinoviev be expelled from the Central Committee. (Stormy applause. Voices: "Quite right! Quite right!" A voice from the audience: "Trotsky should be expelled from the Party.") Let the congress decide that, comrades.

Or was he just making this all up and lying to the people he was taking to? Purple who would have been really able to call him out on a lie.