This is nothing new. For decades, SCOTUS refused to hear cases on the right to keep and bear arms, where the Circuit Courts applied Supreme Court precedent for the opposite of what the precedent said.
Institutional failure, or institutional success? That depends on one’s motive. I see the the Supreme Court as having done great damage to the US constitution. It is intellectually dishonest, but gets away with this by applying the legal rule that its decisions are the last word on what “constitutional” means.
This body hallucinated abortion and homosexual marriage into the constitution.
Failure to explore credible claims of election fraud is not unexpected. It’s a “hot button” issue, and the court prefers the result that cheating delivered.
Clarence Thomas has been reluctant to take on recent 2A cases because he has no confidence that the Supreme Court as it is currently constituted will uphold the fundamental right to keep and bear arms.