i think that one of the element that is difficult about this scenario is that in an information session (which i assume this was), the director/teachers are actually there for the parents.
in the information sessions that i've been to--in a variety of schools/settings (public, private, montessori and waldorf)--the teachers/directors are there to give information and answer the questions of the parents while the children have some kind of free play.
in such instances, i'm there with a *baby* and i watch him carefully because many 2-4 yr olds do not know how to play around a baby. it's ok, honestly, i know they're not being malicious.
but, most of the kids are varying degrees of "bratty." you know, they're little kids and they want and they assert and they will put up a fuss and form little units/teams and just be "bratty." please note that i say this in a light hearted way. in fact, they're just being 2-4 or 4-6 yrs old and for the most part the behavior is harmless at every level.
what i notice when i'm there is that one parent usually follows the kid to ensure safety, manners, and what not, while the other parent is there with the other parents and teachers and director asking the questions. it's more like a play-group setting than an actual educational/child-care setting *during these meetings*.
this is not to say that i think that you were wrong in your assessment, that there isn't a problem of bullying within waldorf (or any other aspect of society) that needs to be named, contemplated, and resolved, but that it may be a situation where the directors had no intention of becoming involved because, in that moment, it wasn't his/her job to be involved. s/he may have been waiting on parents, and the parents may have more tolerance for their child's behavoirs or for 'working out the squabble' or whatever you might call it (brattiness or bullying too), than the directors and teachers might, and obviously more than you did.
in the actual classroom, it may be different. i don't know if i would risk it in this instance, either, but there you go.
and as for a statement fromt he admin saying that "this place isn't for you" and wondering how they stay open. . .
it's a statement i make frequently myself. i teach yoga. i teach it in a specific way. that way isn't for everyone. i have enough students to support my business and i attract more than enough new people to keep it growing. but, truly, it is NOT for everyone. there are lots of other yoga teachers out there who may be a better fit, and i even recommend some to certain folks. honestly, it's not just egotism or whatever. it is ok to say "this place is not for me" and for someone of that group to reflect that back to you "this really isn't a good space for you, you might prefer x."