If you leave a job, you likely just leave a job because it does little good to carpet bomb an employer, especially since future employers frown on militant, slightly unbalanced people.

But it's a Whole Foods - even the shoppers are slightly unbalanced so a future employer won't expect much.  If Whole Foods customer statistics were extrapolated out to the population, vaccine herd immunity would evaporate for the entire country.   They are anti-science kooks, but the progressive kind, so most in science tolerate them in a way they don't do for conservatives because, you know, they aren't shopping next to conservatives in a Whole Foods.

This former Whole Foods employee didn't care about burning some bridges, their resignation letter was nearly 10 pages of a novel - in "Game of Thrones" it took George R.R. Martin 10 pages to set up the characters, show a Lannister nailing his sister and push a kid out a window.   This guy killed his whole career in less space.  What are the complaints in this 2,300-word tome?   What you expect from an angry person who worked at a Whole Foods in the first place; some insider truth (they don't recycle, throw out food, sell junk, anti-union, waste energy) and some weirdness (a manager compared Whole Foods to a religion, they have to wear ugly t-shirts and the company doesn't like it the slacker sense of entitlement if you want to roll in 20 minutes late) and check out this Alan Ginsberg-ish (in that it is hippy crap and makes no sense) opening:
My experience at Whole Foods was like an increasingly sped up fall down a really long hill. That got rockier with every metre. And eventually, just really spiky ... With fire, acid and Nickleback music.
There's more, but just go over to Gawker and read the whole thing because a science audience has some tolerance for madness but you want it on your schedule.    However, the Whole Foods parking lot rap won't take much time at all and you can make fun of a gangsta in a Prius breaking bad over...whatever it is to Whole Foods shoppers: