...it's nothing compared to this, the 1998 Buick Signia concept.
Introduced at the 1998 NAIAS, the Signia was based on the Park Avenue architecture.
It had a lot of interesting features. 240hp Series-II V6, hybrid all wheel drive system that controlled torque based on wheel speed sensors monitoring traction speeds (I think that's similar to what Subaru had at the time, though I'm not sure), powered rear floor that extended 15 inches out the back, etc.
But, the Signia had one little problem...it was horrendously ugly.
So, yeah. The Aztek may have been bad, but Buick could have sold something even worse.