![enter image description here](https://i.stack.imgur.com/2xUfc.jpg)
We bought our first house and it needs some work, especially the walls. I’m wondering what’s the best way to take care of this horribly patched drywall? We have large sections of wall in various rooms that look similar to the one in the picture. We think it’s from the previous owners DIY remodeling, but they weren’t very picky about their results, it seems. Is this fixable? Or would we need to replace whole sheets of drywall?