This has been a challenging year for Vikings head coach Mike Zimmer, and this has been one of the most challenging weeks of that challenging year.

With those struggles, the Vikings fan base has become increasingly critical of Zimmer. And Tuesday, the frustration with fans' frustration seemingly boiled over for Zimmer's daughter, Corri Zimmer White.

In a post on Instagram, she said Zimmer has "lost 16 pounds this season because of stress" and routinely works ultralong days but that "so called 'fans' … tear him apart."

She continued in her post: "I've seen it all today to making fun of his appearance to judging every move he makes and it makes me sick to my stomach."

I'm with her — up to a point.

Critiques about performance, decisions and strategy come with the territory. But getting personal is never a wise or classy move.

Read Michael Rand's blog at startribune.com/randball. michael.rand@startribune.com.