Yumi, I can recommend you to start from Bring me the horizon, album "There Is a Hell, Believe Me I've Seen It. There Is a Heaven, Let's Keep It a Secret". This is one of my favorite. There is a link on their music video It Never Ends https://www.youtube.com/watch?v=ltbt9MaepFY

Azizi, I heard "I see stars", pretty good band. About Asking Alexandria I can say I really love their album From Death to Destiny, it sounds like something between post-hardcore and hard rock music and in 2013 it was really something new in metal.

I think, it happens because musicians grows up and that kind of music where you play only breakdowns and screams after 2-3 year just annoys. I think, it's not because of labels

I see stars 

Asking alexandria

We came as romans

A day to remember

Capture the crown

Woe is me

Jamie elsewhere

Everyone dies in utah

Empire the crown

and few others. Can't remember all their names. But the thing is their old album portrayed their music better compared to their newest piece. I guess it is enevitable signing up record deals with big labels; their creative control perhaps are somewhat limited.

I am not sure about metal music,but I know metalcore music from a song called "Unravel",it's Japanese song,and the singer is from a Japanese band.

Well,after that I try to listen some metalcore music,it's amazing.But I really don't know much about this,I just listened to a few songs from Suicide Silence.If you don't mind can you please recommend some bands or songs?