I've had a young mother do the same to my sister in law. I delivered some of the gifts and it seemed the gifts were ok until I mentioned who they actually came from. Then they became 'junky'. My voice turned to ice as I said, "They're not junky. They are toys. The kids played with them for hours."
She got the message and tried to cover it by saying all the parts made them junky and the kids don't clean them up. Didn't help. I told her that's true for all kids, but it doesn't make the gifts junky.
I have never heard her say anything like that to me since. We are very slowly becoming friends. I think that is in part because I don't take her guff, and she respects that. Ordinarily, I wouldn't bother but her kids are my grand niece and nephew and I love them dearly. They are worth it.