Barleywine
Myself, I would see Snake in house of Snake as bungled attempts by a malignant person to harm the sitter. i.e. someone who is so obviously malignant, you can't miss it, and therefore gives the sitter more ability to control or steer clear of the person, or quell the attacks. Or, because the attacks or troubles coming are so glaringly obvious that the Snake becomes almost an inept caricature of itself. A self-defeating Snake that eats its own tail.
In the sense of Snake as problems that affect the sitter, and not Snake as a person, then I would see it as the sitter themselves creating his or her own problems.
But hey, that is just my take on it, based on reading experiences.
I like the idea of a card being so over-the-top that it becomes a caricature of itself. I can think of a number of cards where that would make a lot of sense. It reduces the subtlety that can lead to missing the point. It could be like the Coffin saying "Dead is dead, after all" or the Cross saying "What part of 'No' don't you understand?"