I think it's true that none of these philosophies will be a "one size fits all" type thing. Personally, worry and anxiety just makes me useless. When I'm drawn into worries and fears about external factors, it saps me entirely of the energy to deal with just about anything, which is why I find stoicism helpful.
I'm sure there are other people who find the stress and anxiety about external factors as motivating and bearable, and would not find stoicism useful.
ETA: I don't find everything in stoicism to be useful. I kind of use my own personal "buffet" style approach, where I pick and choose what pieces from different philosophies work best for me.
I should have mentioned, that later after they got tired with reading Plato and Aristotle again, Cynicism, Scepticism, Epicureanism and Stoicism all saw new light, but usually they were more combined into general useful advice on living a good life.
Cynicism's rejection of social norms, when it re-appeared in the late 18th century, morphed into a disapproval of society in general, and the modern usage of 'cynic' was meant to be someone who rejected social structures, and thus someone's who is negative, rather than someone trying to live a virtuous life without being 'chained' by society.
I'm sure there are other people who find the stress and anxiety about external factors as motivating and bearable, and would not find stoicism useful.
ETA: I don't find everything in stoicism to be useful. I kind of use my own personal "buffet" style approach, where I pick and choose what pieces from different philosophies work best for me.