A City of Lies Page Four (chapter1)

Yikes, and of course Lila obviously knows the truth about why Adrien is mad.

Lila: ( To Marinette) The love of his life dumped him badly (translation) He's mad because YOU blamed him for the Akuma getting away and you obviously HATE that side of Adrien as Chat Noir, who you claim to love as this perfect model boy at school, Marinette, now he he is starting to hate you as Ladybug because of how you rejected him constantly and what happened last night, and now you're getting a taste of your own medicine as he's treating you like you treat him..only as Marinette. You're not his pedestal anymore, sweetheart, and it's all your fault.

And poor Marinette in tears.