Che was vehemently opposed to individualism, if I remember correctly. I personally think Marxist-Leninists have often failed to really apply the dialectical method to individualism, however, and I think a solution needs to be based in the fact that both individualism and "vulgar" collectivism are flawed viewpoints of the world.
Individualism tends to tie itself to subjectivism, pragmatism and voluntarism and gives the individual a great amount of sovereignty and autonomy that in reality doesn't exist. Vulgar collectivism on the other hand tends to act in a deterministic manner, it can't perceive collectivities as being formed out of material conditions and expressing certain interests. Classes are real materially existing collectives, whereas something like a nation-state is a metaphysical collectivity that exists out of a moral command, i.e. that one will serve their country (when posited in such a sense that it aims to flatten contradiction anyway)
The answer is to realize that the collective has primacy over the individual, but that the individual in turn influences the collective in numerous ways, and that communism has to be a system which while placing emphasis on classes and class struggle, also has a basis in the individual. Capitalism crushes individuality in all senses except in that which serves private property - there it encourages individuality to the point where it tries to break collective bonds.
“Socialism cannot abstract itself from individual interests. Socialist society alone can most fully satisfy these personal interests. More than that; socialist society alone can firmly safeguard the interests of the individual. In this sense there is no irreconcilable contrast between “individualism” and socialism. But can we deny the contrast between classes, between the propertied class, the capitalist class, and the toiling class, the proletarian class?” - Josef Stalin, Marxism Versus Liberalism: An Interview With H.G. Wells, 1934
"Those who are in ideology believe themselves by definition outside ideology: one of the effects of ideology is the practical denegation of the ideological character of ideology by ideology: ideology never says, ‘I am ideological’." - Louis Althusser, Ideology and Ideological State Apparatuses, 1969