Trotsky's entryism was pretty specific, I don't think particularly related to your beefs. His argument was that forming small far-left workers' parties didn't m

Trotsky's entryism was pretty specific, I don't think particularly related to your beefs. His argument was that forming small far-left workers' parties didn't make sense if there already existed large mass workers' parties, and instead communists should work within those, even if they were more moderate than you'd like, rather than forming new parties, which would be ideologically pure but not contain the actual masses of the working class who would have to form the basis of any workers' government. In most Western European countries, the majority of the working class supported various kinds of Labour and Social Democratic parties, so that's what he advocated joining.