I worked for slightly over a year for a boss that I considered to be toxic, abusive and unstable. While there were times we got along on a personal level, overall I was quite miserable working for her. The job itself was great and offered many benefits (government) that other jobs can't even come close to.
I found another job and since there was a part of me that did like her personally, I left "for more money" and never let her know she was the cause. Moreover, I was ultimately uncomfortable approaching her or HR about the issue.
After 8 months at the new gig, a job opened up at my previous employer, but in a totally different department. I jumped at the opportunity and was brought back in (with a strong recommendation from my previous boss).
Life was good until about a year in, when an integral employee for the toxic boss abruptly quit for a job out of state. This triggered a restructuring and I was moved back to her department because of my specific skill set, having previously worked there.
After 6 months of my boss exhibiting the same type of abusive and toxic behaviors as before, I was at my wit's end and left again. This time she asked me if it was due to her and that she would "try to be nice" if I stayed. I told her that I could definitely tell she was under a lot of stress but it was once again moreso the attraction of the new job. To straight up tell her yes I'm leaving because of you is just not in my nature. As before, there were times when we genuinely bonded if she was not in one of her moods.
So, now I have this really strange block on my resume that I'm not sure how to explain in an interview. I desperately wanted to work for that company but just did not mesh with my boss. Although I think it would have done more harm than good, I did not report any of her behavior.
In situations like this, am I expected to try to work through the situation? As a potential employer, would this be a red flag that I did not handle this "correctly"? While I was working for her, I lived in fear of her and would bring a great deal of stress home with me. At the time, all I cared about was getting out ASAP.