Why is he angry ? ( S4E10 Massive SPOILER )

Oke no FR, he doesn't seem confident as usual about this, I mean he ended S3 with that evil confidence, and now he appears once and he is angry and yelling, as if gathering this Icon didn't go well, He's as angry as if he had to IDK what and it left him so angry? Also, he always seemed rather scared of his Master, but now he's angry lol???? Is this foreshadowing that their alliance won't stay till the end? Also that Bow is sooooooooooooooo badassand I hope to see him use it as much as he used...