Yes, the Bush v Gore ruling was justified, because the Supreme Court properly upheld Florida's ability to decide their own election results. It would be an overreach of government power for the federal government to decide how to certify Florida's election results. Leaving it up to state's rights was the proper outcome for the federation.
Yes, the Bush v Gore Supreme Court ruling was justified, because each state has its own rules for certifying elections. It was the State of Florida's job to certify its results and send them to the United States for counting. It would have been unfair if the federal government had gotten involved in that process.