I think we can tell St. Paul a big "thank you" for including all these in his letter to the Galatians! Maybe these words will resounds with others to whom the words "Seven Deadly Sins" sound horrific.
I don't think you are saying that the devil does NOT have a part in these sins, are you? Or are you merely saying that it is the weakness of the human will and origial sin that cause one to sin in these ways?
I Jn 2:16
16 For all that is in the world, the lust of the flesh, and the lust of the eyes, and the pride of life, is not of the Father, but is of the world.
16 This I say then, Walk in the Spirit, and ye shall not fulfill the lust of the flesh.
Both Adam and Eve tried to blame everyone but themselves.