I can't talk for every capitalist countries, but here school teaches kids that Marxism-Leninism is very very bad and the same as fascism, so people internalise it from a young age and later in life resist any evidence that goes against that narrative.

So there really aren't many of us here, the few people that realise that capitalism must be destroyed are led towards Trotskyism because in their head, Trotsky must have been the good communist since he disagreed with Stalin.