With his long run assault on the rule of law, I think McConnell is possibly worse than Trump.
The damage he has done will take generations to undo. May even stoke a civil war.
The justice system he has shaped is designed to force the country to be run along partisan, non-democratic lines for decades.
It is the US Constitution's deficiency that it can make change hard, where other countries evolve through their parliamentary and legal systems. Think slavery. To its shame, the US couldn't resolve the issue peacefully, unlike nearly everywhere else.
McConnell is recreating the system which produced the last civil war.