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Crying scene in 5? Don't you mean 6 when he's being beaten with a pipe?
I think many of them can be labeled as the worst for different reasons...I think 3 was the worst initially for taking out Michael. Then, 6 was worst for adding in the ridiculous curse of the thorn. Then however, H20 was worst for ignoring the shit that was introduced to us, which MAYBE would've been tolerable story additions had they been expanded upon in H20...
I'd say beyond 5, they're all tied for adding ridiculous story expansions, and then not continuing with them into the next film. Halloween 6 is only tolerable for me really if I block out the plot.