They where the heads...but they don't wrote everything. It's just not how it works. Yes they set the tone, they do the outline. But you have editors, the cgi people, the writers all having hands in it. And if he only had one line in one movie and the rest was just a smirk what exactly are you complaining about? His smile doesn't feel right? He has multiple on screen appearances, across years of rea world time, in films that each have multiple writers, multiple directors, multiple screen play people, multiple editors and execs. They all have a hand in the way the character comes off. It's not just two people. It's just not how it works. They have over sight, but when there's thousands of hours of tape, multiple movies, various cuts and edits things gets handed off, things get redone and missed. Sorry, but it's not just two people.
It's like you just read what you want to from comments. James Gunn did write Thanos' lines in GOTG with Feige consulting. And it's not Thanos being written over multiple years by multiple people, He's appeared twice, Avengers doesn't count as he had no lines.
You state the production team trying to make me out to be stupid and naive but you completely miss the point of my complaint at every chance and insist you know best, it's ignorant. I have one simple complaint and you can't understand it so I'll put it as plainly as I can.
I think the "lines" the words he actually speaks, not the way he speaks them just the words themselves, the ones written by Gunn who wrote the script, are not indicative of the character. I have no problems with his cgi, design, mannerisms, voice, tone etc. Just the lines.
And now a simple complaint about a detail of his character has turned into this fiasco.
How They Fit Thanos Into Guardians of the Galaxy -- Vulture