I get what the show was going for, but there doesn't seem to be any payoff to making her so shrill and grating. For example, when Loerial is being wooed to sell the inn, it might have been nice if Lorelai considered selling because her business partner is unreliable, e.g. when she took a nap instead of signing for the new stove, and unable to make hard business decisions, e.g. flipping out about having to drop lunch. Or if Sookie and Lorelai had a talk about how Sookie might be happier just being a chef and not having to deal with the business side of things.
I’m sure others feel the same way, but I think for me S4 – S6 are hard to watch less because of the soapy plot lines and more because the characters become such cartoon versions of themselves that almost everyone is unlikable. The townies go from quirky, to shrill and annoying. Liz and TJ are horrible to watch. Emily, Richard, and Rory become all fairly unlikeable (IMO). And I really don’t understand how Emily went from begging Richard not to sue Digger (whom she hates) because he is in a relationship with Lorelai and she doesn’t want to lose her again, to deciding that trying to sabotage Lorelai’s relationship with Luke was a smart idea.