No. Einstein was a lifelong defender of the Bolsheviks, and stood by Stalin even during and after the purges. The man staunchly supported USSR even when it became controversial post-ww2. He is the highest profile advocate of the USSR during ww2.

Given that he was a socialist before ww2 began and that the USSR rescued jews it actually shouldn't be that surprising that a jew who lived in germany during the peak of antisemitism before the war and escaped the nazis would be quite supportive of Stalin.

We don't know too much about his opinion of lenin's policies, he was vague about it. I prefer to think he sees Lenin's approach as unadvisable because of how incredibly difficult it was and how Lenin spent his entire life on it, sacrificing himself, and arguably cut his life short. Most people think the wound he took in the attempted assassination probably contributed to his early death.

I'll refer to@Awoo@hexbear.net's post referencing Einstein's letters