Not sure why you were downvoted. This is the best answer I've ever received to my question.

The Senate is not required to hold hearings on nominees. The Senate did not hold any hearings until 1916.

That is a distinction without a difference in this context, which is about the Senate abdicating their constitutional responsibilities. They didn't hold public hearings before 1916, that is true (the history of why they even started holding public hearings is pretty controversial in itself.) However, they still held yay/nay votes on the floor for the nominees, in order to fulfill their advise and consent role. McConnell refused to hold a vote, therefore he failed in upholding the Senate's constitutional role on the SCOTUS confirmation process.

That's not how the Senate works. They are not required to hold a vote in order to declare "nay" on a nominee. Declining to vote is effectively a "nay". It's no different than declining to hold a vote on a bill which they know will not pass.

This is how Congress and the co-equal branches of government are designed to work. Congress and the President often don't get along. It's a feature, not a bug.