Juan Guaidó has a postion that, given the situation, constitutionally requires him to make a judgement whether the republic has a functioning president and vice president. He acted on that requirement. That the members of supreme court are beholden to the executive, is no secret and inevitable given framework they work under. Therefore, the mechanism that was supposed to adjudicate the impasse is compromised. Short of war, it seems from the outside that the situation in Venezuela can't get much worse. Hopefully Guaidó's declaration can serve as a catalyst for change, and he should be respected for using the legal tool at his disposal to try to force development in the situation.