He's served as a U.S. Circuit Judge for 12 years. W/out knowing who he worked/wrote on behalf of or for what purpose, there's literally no way to discern if his findings were biased.
But that's a false supposition. The fact that Kavanaugh had secret work is the disqualifying factor.
His appointment reflects a corruption of our govt, but specifically a high crime by at least Trump if not also Bush & Obama.