My wife and I binge watched that show but I dumped it in the third season when it became a soap opera. One funny part was that I told my wife that I got the feeling her character was supposed to be the “hot” one, but I thought Donna was the hot one.
I had to say it very delicately, though. :)
In my experience most TV shows turn to crap by the 3rd season. A few exceptions by really talented people; but most people working on second-rate shows don’t have or aren’t allowed the creative vision to plot out a 5 or 6 season story arc. As you said they turn into melodrama.