I think Nixon should be credited with winning the Vietnam war and bring the troops home with honor and victory.
The Democrat Congress then defunded the defense of South Vietnam. Let that sink in. Consider Democrats defunding the police in some US cities. Democrats defunded the South Vietnamese military. There was also accompanying, complimentary legislation. Had President Ford attempted to send an aircraft carrier to provide air defense, the Democrats in Congress would have impeached him in a heartbeat.
The Democrats surrendered South Vietnam. They rendered the death of about 60,000 Americans pointless. That is what they did. Why? Perhaps so they could deny Nixon the credit he was due.
And people act like Vietnam was all Nixon, as if LBJ never existed.