簡単とか言っときながら自分も失敗してるやんって英語でなんて言うの？

"簡単とか言っときながら自分も失敗してるやん" - You're failing even though you were saying it's easy. - You said it was easy, but you're failing miserably. - How come you aren't able to do it even though you said it's easy? (簡単と言っていたのにどうしてできないの？）