Technically screamo is better known for sweep picking and shredding which is much more complex than super speed down/alternate picking of 70s/80s metal. And tbh screamo takes technique, it isn't shouting at the top of your lungs, that's a primitive way of looking at it.
And your tabs aren't aligned so the chords are misshapen there.
And before you tell me how I know little.
I can play Iron Maiden songs like Rainmaker, The Nomad, The Trooper, Can I Play With Madness? Etc.
As well as this, I can play DragonForce songs, My Spirit Will Go On, Body Breakdown, etc.
On top of this I can play ALL Atreyu songs, Including When Two Are One. If you think any 80s metal is more complex than that with their tremolo, hammer-ons and pull-offs, you're mistaken as shredding is a lot harder. On top of that, Atreyu stick to roots, they play in KEYS. Use pentatonics and arpeggios.
Bullet for my Valentine use FRY screamo its not easy to master at all. Please listen to their newer music as they've established themself after The Poison album, check out The Last Fight from their album Fever, the solo. That's ENTIRELY arpeggios in classic formation! More than I can say for much Metal, well Megadeth of course are exceptional.
I'm not saying I dislike metal, I prefer it to most rock. But the misrepresentation you've given of some of my favourite bands is appalling. You even listed Bullet For My Valentine in the same category as Bring Me The Horizon, just for that it shows you know nothing. Personally, I find if you have a problem with Screamo or Thrash Metal, fair enough but don't misrepresent them and make a case against something different. Bullet are specifically softcore Metal, older stuff from EP and Poison is Thrash, but seriously, know your stuff prior to ranting about my favourite music without knowing it. Screamo is no way considered a new wave of metal. That would be Nou Metal which is rising again.
Again, apart from the BPM, Atreyu is more complex than Dimmu Borgir or Lamb of God.
Bands I like you listed.
Atreyu
Escape The Fate
Bullet For My Valentine
Cannibal Corpse
Children Of Bodom
Behemoth
Dimmu Borgir
Metallica
Iron Maiden
Megadeth
KISS
Slayer
Black Sabbath
Pantera.
Sorry if this seems aggressive, it's because i'm passionate about my music, as you'd understand.
I do agree with the fact that they write their own stuff and compose it themselves. More than I can say with the voice-altering top10 Pop Charts. And also I cannot deny that the metal solos from 70s and 80s are awesome and that Megadeth solos take me ages to learn that's true Metal.
And tbh only SOME small minority of metal bands stick to only Power Chords, Same with Screamo. Both use bridged parts, solos, breakdowns etc. But they BOTH still use Power Chords, Iron maiden do, Atreyu do, Five Finger Death Punch do.
By the way, Emo is COMPLETELY DIFFERENT from Screamo and Metal altogether. Emo is bands like "Secondhand Serenade" and "City and Colour" not Escape the Fate etc.