Jehovah is a God of love, he's always right, he knows everything, every decision he makes must not be challenged or else face his terrible destructive and deserved rage.
Satan is Jehovah's psychological hook on which he hangs all shadow projection of his own evil of which he is in serious denial of, since in his own mind he can do no wrong and must never be challenged, and every challenger must be defeated and destroyed forever.
This is where the extreme lopsidedness of this mythology lies which creates a psychological lopsidedness in His worshipers who consider him flawless in attributes. This makes it hard for the worshiper to see the world clearly(denial), because of his own viewpoint of sin and the need to be sinless and flawles in devotion/obediance which causes him loose a large part of him self through denial of his own nature.
This constant denial by the worshipers of this Deity's evil side is not healthy psychologically, and is partly/or largely to blame for a lot of cruelty in the world by the shadow projections they cause by denying one's own evil. Denial leads to violence in extreme cases of this lopsidedness.
Jehovah Satan Mary Jesus would make a nice Quaternity Deity and promote less denial in its worshipers less violent reactions to hooks on which they hang their own evil in which they are in denial of since there would be less denial from a more accepting nature of ones own evil and a more psychological balance.