What makes that all the more aggravating is that most of the steps she'd have had to take to prevent the disasters are also unfair. Pet- and childproofing the gate is unfair because she would have to be penalized because Farley and the offsprings can't control where they go. Training Farley better is unfair because she'd have to give up her time for something that should be a lot simpler. Having to anticipate how a child sees the world is unfair because she isn't one. Having to tell April to do things in a way she could understand is unfair because Elly knows what she means so April should too. Finally, having to keep an eye on a small child is unfair because her time to herself goes bye-bye.
To summarize this, I'd like to remind you of my belief that Elly is pretty much a mess because she thinks that it's unfair that she lives in The World That Is instead of The World As She'd Like It To Be. In the World As She'd Like It To Be, she wouldn't have to have told April who to ask for permission to leave the yard so having to live in a world in which April doesn't know who that is not only fills her with despair about having to spell things out, the injustice of not having things easy settles down into her stomach and burns. Also in the World She Would Like To Live In, she gets to be special and judged by her intentions instead of her actions; everyone else, of course, doesn't get that honor because they're not her.