Drywall repair is a project that most homeowners will have to face at one time or another. It encompasses a wide range of problems that include everything from nail pops to holes from doorknobs to major repairs like water damage and cracks caused by a settling foundation.or
While it is okay to match your ceiling and wall texture, the professional recommendation is to have some contrast between the color and texture of your walls and ceilings. Identifying the separation of space from the wall to the ceiling will give a room stronger lines and more spatial definition
Moisture issues that can only be seen once you remove the baseboards to see what is happening behind it.
I'm hoping it is #1...poor paint adhesion is cheaper and easier to fix than moisture/mold remediation.
The paint is ruined in that area so you might as well pop off the baseboards to have a look (flash light...hands and knees) to see what you can see. To me this looks like moisture...but I'm hoping this is more along the lines of poor paint adhesion to the layer already on the drywall.