The major flaw in Hamlet's character is his tendency to hesitate and overthink.
Throughout most of the play, <u>Hamlet is troubled by his tendency to overthink, which is also what leads him to fail</u>. Although he finds out that Claudius murdered his father at the beginning of the play, <u>he delays the act of killing his uncle in order to get revenge every time he is strongly influenced by his own thoughts</u>. In other words, every time Hamlet finds an opportunity to murder Claudius, he starts to hesitate about it. Moreover<u>, Hamlet's tendency to overthink is also present in his famous soliloquy "To be or not to be"</u>, where he vacillates between life and death.