Uncomfortable/unfiltered advice

I recently quit my job because of a manipulative HR manager.

I’ve been in this company for almost 6 yrs, I was the CEOs trusted assistant. Then this HR manager started feeding me lies about our other coworkers which led me to start hating on these people. I trusted every word she said to me because we started working around the same time in this company.

And since I CARED too much for our CEO and company, I started sharing my opinions to her which led me to talk frankly and honestly to my CEO. Before I knew it, she was secretly waiting for the right time to throw me under the bus. And voila, she told our CEO that I was backstabbing him and everyone in the company.

So now, everyone thinks I’m the bad guy and they started excluding me from their team meetings, giving me less work, leaving me out when there are in person meetups (she used to constantly convince me that it’s important to have these to build “stronger” relationships within the team), our CEO even started making rude and “harmless” jokes when I’m not in the meeting (I found out about this because one of the quietest team members told me about this countless times)

So, I made the decision to quit.

Now, I am going to start working at a different company.

I want to prepare and remind myself that I shouldn’t care too much about the company and shouldn’t trust anyone no matter how they always say that I can be honest them.

Any uncomfortable advice or takeaways from a similar experience you experienced? It would be such a great help. Thanks in advance.