Answered

Why did the Antifederalists oppose the new constitution? They believed it favored the more populous states. They believed it would create an autocratic federal government. They believed it was a bundle of compromises. They believed it would propel the nation into anarchy. They believed it was weaker than the Articles of Confederation.

Answer :

Porshia
The answer is " they believed it would create an autocratic government". The Anti-federalists thought that the constitution would take away people's individual rights by making the government too strong. To resolve this, the federalists added a bill of rights ( which listed individual rights) in the constitution.