Based on the map, why might some Southerners feel the Missouri Compromise favored the North?

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Based on the map, why might some Southerners feel the Missouri Compromise favored the North?
There was less farm land south of the line.
There was more territory north of the line.
Enslaved and free people are giving their opinions about slavery.

Some Southerners might feel that the Missouri Compromise favored the North because there was more territory north of the line. This meant that the North had a greater opportunity for expansion and the potential for more states to enter the Union as free states. Additionally, the presence of enslaved and free people giving their opinions about slavery might suggest that the North had more influence in shaping the compromise to align with their beliefs and priorities.