Yes, these are drawn poorly. It’s deliberate.
I found this tumblr, Off Model Simpsons, that collects drawings of Simpsons characters that are purposefully weird. I thought it’d be fun to doodle some of my own. As Lenny and Mr. Burns are two of my favorite characters, I thought I’d go ahead and do the whole Springfield Power Plant crew. It’s surprisingly fun to do, I recommend it! I didn’t want to get too crazy with them, I find it more unsettling when the character designs are off just by a little bit.