I, too, have struggled with the balance between not blaming Satan enough, and blaming him too much. It has actually turned into one of the central focuses of my work over the past 20 years. Asking questions like, “When is it him, and when is it me?”
The simplest and most complete answer I have found is in Moroni 7. “That which is not good is of Satan”
vs12 ” that which is evil cometh of the devil; for the devil is an enemy unto God, and fighteth against him continually,”Notice the obnoxious word, “continually”.
Moroni uses the phrase, “everything which inviteth and enticeth”, which I propose includes thoughts and feelings. So if a thought or feeling increases pain (or other unpleasantries) in an unedifying way then it is not from us or from God, but from Satan.