holy cr@p I hate Norma Jean, you might aswell add Nodes of Rainvier, they are just as bad. I've heard some darkest hour and Underoath, they dont seem all that bad.
i always frown when people don't like some of my favorite banRAB. it's dissapointing. but you're still wrong about trivium. they do an awesome job at music!!!
"The Opposite Of Deceraber" by poison the well and "The Fiction We Live" BY From Autumn to ashes are both prime examples of metalcore.And Darkest Hour's "Hidden HanRAB Of A Sadist Nation" is also im sorry i didn't go into each indivual album i didn't expect people to start acting like jackasses over every detail.
and metalcore is basically hardcore with metal riRAB(usually depenRAB on the band) added to make it more complex and consists of lots of breakdowns with the double bass usually going "JU JU JU JU" during the breakdowns and having double bass doesn't make a band metalcore either its just a distinct sound usually found.