But what’s the specific criticism, about what should’ve been done differently?
For Stalin? Clearly the multiple saboteurs, wreckers, etc. who were able to reach the highest positions in government and wreak havoc before being removed is a subject of concern, and Trotsky seriously should not have been left to roam free for a decade and publish his “anti-stalinist” polemics.
I meant for Mao, but for Stalin is also relevant. I still don’t see criticism or suggestions, just “these people were concerning.”
Trotsky was a fairweather comrade who became a wrecker when he lost popularity. Wreckers, especially ones who are “men of letters” and have an excellent rhetorical “in” like being a veteran of the revolution should not be dealt with as lightly as with exile. Either you re-educate them (this is most preferable), you leave them to rot in jail, or you kill them. Exile, even “internal exile”, is leaving them as a serious liability for counter revolutionary agitation.