Joined a healthcare startup in India as a health coach, Everything was smooth, I was really good at my job but my manager was feeling insecure because I was able to improve the company policies and operations in a very short span of time. She started being rude and sarcastic, often screaming and shouting at me for literally doing my job (Giving dietary advise to clients) I asked for a group discussion so we can sort out her behaviour issues since the team working under me (Customer Care) was complaining about her behaviour issues as well, She refused and asked me to send her an email with all the issues instead, I insisted for a group discussion since that would not personally hurt anyone but she wanted me to send an email, so I sent it out, 1 month after sending out the email she called me and asked me to resign saying “You're Overqualified for the position” the HR lady (Also extremely unprofessional and rude and a close friend of my manager) called and asked me to resign as well, I spoke to the CEO of the company and he said everything is good and he knows for a fact that I'm the top performer in the company, 2 days after this incident the HR started threatening me and my manager stopped sending me any new clients/work she removed me from the email alerts that sends us the meeting links etc, 5 days after this the CEO says he knows that this is wrong but she's a high level manager and he'll have to take her side, “She can't manage you so we'll have to let you go”. So I was forced to resign. I researched and found out the dynamic duo manager and HR have fired several other employees basically anyone who threatened her position or someone that didn't suck up to her, any suggestions on what can be done?