adjective
sarcastic
sar-KAS-tik/sɑːrˈkæstɪk/
Using irony to mock or show contempt.
His sarcastic thumbs-up mocks the collapsed cake.

Etymology
Sarcasm originally described a biting taunt, so sarcastic characterizes language that cuts through mockery. The adjective's formation may have been modeled on enthusiastic.
In context
And so, it's in a way sarcastic. Learn to love the lie. You'll be happy. You'll be better off.