Any thoughts on the phone call Wilkes received from the school noting that Ellie was not eating and there were concerns about the friends Ellie was associating with? It sounded like the counselor was giving Wilkes the "heads up" about possible problems. Wilkes seems to think that it is up the the school since she couldn't do anything remotely. As usual she does not consider her child having a problem but the school having one by not having a plan to "fix" Ellie.
First of all school will be letting out soon for the summer so, really, what can the school do in the near future? Wilkes states that it is tough being a parent. Of course it is and maybe it is time she be one rather than trying to be the friend that doesn't want to rock the boat. I hope that Ellie's dad received the same phone call. It is no surprise that Ellie may have problems at school with her mom constantly putting the school and teachers down. I wouldn't doubt it is she plants these negative ideas in Ellie's mind and encourages her to be defiant.
The school has rules about social media that includes the behaviour of parents and putting forth negativity about the school. With Wilkes (on numerous occasions) putting down the school and teachers, that rule has been broken again and again. How does she expect Ellie to have any respect for her teachers? Again, no surprise that she may be choosing like-minded friends. This is the critical time to catch your teen before serious problems develop.
As for the concerns that Ellie may have an eating disorder it seems Ellie eats enough at home. It will be an interesting summer if Wilkes ignore the problems and Ellie spends her time getting into negative situations.