Let's start with the woman who actually ran the place when she was off babbling witlessly about not being able to work a computer and allowing a lying thief to help her boyfriend jack the place and threaten her child. It seems to me that Moira tended to view Elly as being someone who simply didn't understand what a retail business was all about but had to be taken more seriously than she should because she owned the place on paper. What this meant is that she had to stand by and grin while the dimwit boss she had to flatter made idiotic business decisions like getting rid of a coffee counter that brought in customers, throwing temper fits because customers didn't give the vain dolt with the turnip-shaped honker the deference she deserved and letting a lying thief manipulate her. This probably means that she regrets the day when said imbecile's dentist husband helped bankroll his moron wife's need to play magnate.
As for that lying thief I'd mentioned, Kortney got away with a lot of mischief because she saw our hero as an inattentive dilettante with a bottomless appetite for flattery who she could manipulate with ease. All she needed to do is whine about made-up hardships, tell lies small children could see through and tell Elly how great she was and she'd avoided getting sacked for stealing from the business, helping her boytoy loot the place and threatening April.
Since Moira and April did most of the real hiring, it's not much of a surprise that Kortney's replacement Bernice is a sort of clone of Moira herself; she too regards Elly as a well-meaning but inept obstruction who simply wasn't cut out to work retail.
Finally, we come to April herself; Elly seems to have hired April on to keep her from running around unsupervised and adjusting her attitude. This backfired hilariously when Kortney threatened to punch April in the face for informing on her; given how stupid Elly is and how little she trusts her children tell her the truth (as well as her oh-so-characteristic refusal to even see the possibility that she should make things right with her child), all she did was inflame the sort of animosity that keeps April from phoning, writing or e-mailing her poor aggrieved mother.