Harry Potter?

One thing that  really don't get about Harry Potter is that when there all this really scared things in his face he's not scared in the least bit. I know this Harry Potter so it's not supposed to be very realistic but come on, even in this fake, "Magical World" you would probably still be scared if there was a guy with a giant white face next to you or a HUGE snake called a Basalisk which has huge fangs and is poisanis  so it's pretty scary. And also why is he always the one to make the connections, I know he's the main character and it's a fictional book but still you have to let  some other characters have a chance to do something great besides Harry, Hermione, and Ron. And finally why would Valdemort be scared of Dumbledore? I know he's strong and a great wizard and everything but still. Also Voldemort, you have a army of other wizards so why would you be scared?