What is the philosophical cruxt in, "Hamlet. Prince of Denmark" by Shakespeare?

It's difficult for me to imagine that Hamlet was anything but a well-intentioned fool, whose conscience made a coward out of him. He ended up losing his girlfriend, her father, and friends, because his all-too-wishy-washy, pathetic end-arounds stifled him into inactivity and cowardice. Would you not take immediate action if the ghost of your father, the King of Denmark, appeared to you to demand revenge for his murder by his father's brother in order that he may, 1) usurp his father's throne, and 2) take over his father's ual duties with his mother? Poor Hamlet should have immediately followed his father's advice--alas, he was a pathetic loser who feigned insanity and staged a play intended to make his uncle feel guilty, when all he had to do was decapitate his uncle!