Most GOP presidents would be "failure" by that margin (and mark my words, neither of Trump's SCOTUS picks will vote to overturn Roe v. Wade). Reagan was 1 out of 3 when it came to good conservative SCOTUS appointments (O'Connor and Kennedy both sided with the left on key rulings). Even Coolidge put a horrible New Deal-loving leftist on the court, thinking he would be a good conservative.
I consider Gorsuch to be far more "inexcusable" than Souter. Souter wasn't being tapped to replace an iconic conservative justice and being presented to a GOP-controlled Senate for confirmation.
What?! What planet are you living on? Most consider Gorsuch a Scalia clone. Why do you think he isn't conservative/originist enough? Unbelievable.
As far as Reagan goes, you left out the fact he nominated Robert Bork but Bork was borked. Kennedy nor O'Connor were anywhere near as left-wing as Souter. Both were swing-vote moderates.
Souter was as bad Ruth Buzzy Ginsburg. There is absolutely not excuse for putting up someone that liberal.