Good company but has cultural issues - Graphic Designer Inviso Employee Review

I was employed here for 3 years and was bullied from the start. Management was aware of the bullying, but was friendly with the perpetrators so nothing was done about it. I was once screamed at so loudly by one of the directors that someone in the office past the hall heard. A different director called me a rude name and hung up the phone on me because I tried to speak with them about the bullying. A couple of times, rude notes were left on my car. Daily office interactions were difficult because the bullies would spread rumors. I was not the only one being bullied by these people. Two other employees quit awhile before I did because of the bullying by these people. Three people before me were fired by being framed, or lied about by these people. I made sure to confirm these employee losses with the employees themselves and they all said similar things. All of the employees being bullied were part of the same demographic. The designers were often asked to work weekends but still forced to work a full day when work was slow. Creative feedback was sometimes very vague and occasionally poorly worded. Work was often very slow.