I think you should def see what a lawyer says and then go from there. If you find a lawyer who can help you & thinks you could definitely win without a doubt, then I say pursue a lawsuit. It's worth it to prevent someone else from having to go through what you did & it will make the company take reprimanding employees who are bullying more seriously in the future because they dont want to get sued over & over.
I suffered from bullying at my past job from other managers as well, they were all buddies & protected each other too. My husband kept telling me to document the incidents more consistently (& the incidents I did go to my boss &/or HR about, somehow they turned it on me & made it my fault or brushed it under the rug, so eventually I gave up fighting & just took the bs) & get legal counsel but I didn't listen, wish I had.
I was one of the most loyal, honest, never late, rarely called in sick or took vacations, NEVER abused the company credit card or $ (other managers did), first one in office, last one to leave office, i was without a doubt one of the very few of the hardest working employees there. I ended up getting laid off from there but the bullies who have been lying & stealing from the company for years are still there?!? So assed backwards. I was & still am a little peeved about it but at the same time, I realized that it really was a blessing in disguise, I was super unhappy there.
Sure, I haven't found another job(it's been a year since I was laid off!) but it's been the most liberating, humbling, eye opening experience & everything happens for a reason.
The company is not doing well financially (hasn't been for the last few years) & a couple people whom I still talk to there say things have gotten worse financially since i was laid off & they would be highly surprised if the company makes it another 2 years.
Hang in there & be strong, if you want to talk, inbox me I'm here for you.