I’m surprised to hear you say this. Clarence Thomas has had a long record of voting the right way, the conservative way, the constitutional way, in case after case.
He doesn’t join in the small talk because most of it is bogus. At least three of the justices are idiots, who probably have never even read the Constitution, or at least hold it in scorn. What’s the gain in making small talk and asking fake questions with idiots. Thomas knows how he intends to vote.
And most of his written decisions and dissents are marvels of clarity in reasoning.