The attack didn’t come close to succeeding. The Germans never achieved their initial objectives, much less their final objective of Antwerp. They ran their army out of fuel and chewed up the most effective divisions that still remained. While the German Army continued to be a cohesive threat, they were done as a real fighting force.
Antwerp was an important logistics hub for the allies, but we could have managed without it. After the Bulge, the Germans directed most of their V1s and V2s against the port of Antwerp.
After the assassination attempt on Hitler, Hilter had all involved killed which included Rommel. Rommel knew of the assassination attempt but didn’t warn Hitler and was forced to drink poison.
IIRC, for the Germans, it was a two-fold objective:
1) Deny the port facilities to the allies
2.) Take control of the resources there (fuel, supplies, etc)