Tae and his brother are literally being used by their uncle and Ilay knew about this all along so Tae is mad and disappointed towards both his uncle and Ilay.
Tae's brother was being used since childhood when his uncle saw his projects for the first time.
And now they used Tae to take voice records of what Mckean said( idk why they threatened Mckean with that voice record but...it may be because Tae learned everything because of Mckean and it was clear at that conversation....?idk)
Spoiler!
Next chapter Tae will get mad at Ilay fr and throw that can in his hand to Ilay. Ilay will hold himself back hard to not beat Tae so he will just straight up throw Tae out of the room.
I ship
(KandaxAllen
DokjaxJonghyuk
SasukexNaruto
MadaraxHashirama
GintokixHijikata
Mu QingxFeng Xin
Vanoé
Kagehina
KarmaxNagisa
Sherliam
Renga
Satsugu
Soukoku)
the canon alrdy but impossible ones 



