Board Thread:Manga/@comment-27321453-20181206222153/@comment-29325824-20181207102752

While I don't think Eren's putting up an act per se, he's certainly not being himself anymore. His staments to Armin about being influenced are waaaaay to hypocritical considering his own situation, and his sudden insane obsession with freedom and 180° turn about that (he hated those who take away freedom, not those who don't have it)...

Tl;DR, I think Eren's suffering from a loss of identity because of the 3 powers inside of him. Either he's controlled (which explains his anger at that suggestion), or he's become insane. Really wondering what their endgame is, though.