On the Trump-o-meter of "this is new and awful" to "this is awful but not new," politicised attacks on the judiciary strike me as closer to the latter. As always Trump brings an extra flair of unhinged craziness to it, but Obama lied about the Supreme Court to their faces during a State of the Union. Bush publicly whinged about the detainee cases. Clinton was impeached for perjury. FDR tried to pack the Supreme Court. Lincoln came close to having the chief justice arrested. Jackson refused to enforce court rulings. Jefferson had his party impeach a justice for nakedly political reasons.
Presidents have publicly griped about the courts for almost as long as there has been a federal judiciary. The system has proven itself resilient to far more serious attacks than Trump angrily tweeting at Roberts about "Obama judges."
It's not good, but it's not good in a fairly normal sort of way.