I've been documenting my boss' bs, what would my next step be?
This is my first managerial role and I've been in it for about 9 months. My relationship with my boss was fine until the start of this year. Now it feels like she has it out for me. At first she was hyperfixated on my clothes. It's a little more than business casual. I wear a blouse, black dress pants, and black nonskid shoes (it's a kitchen). She said my black non-slip Sketchers looked too much like sneakers but the other manager is literally wearing nike. Then it was my pants looked like yoga pants (they did not, they're just slim fit, which another manager regularly wears).
A few weeks ago I missed a call from her and messaged her on teams the next day. She said that it was important but only called once and didn't bother to come and find me or even mention it when i saw her that morning. I told her I was working with the team until a certain time and she asked me if it was work related. The reason she called was to tell me I would need to help the team since they were short staffed...which I was already doing. She then said I needed to keep my door or blinds open. I told her I keep them closed because there's construction going on right next to my office and a lot of foot traffic since I'm in between 3 entry points (I didn't say this but she doesn't keep her door or blinds open and her office is a lot more secluded compared to mine). I have a sign on my door letting people know when i'm in and if im not in I'm probably in the kitchen. She also told me that I need to be more present on the line but could not give an example of when I wasn't, because I'm out there more than any of the other managers and I've gotten a lot of positive feedback from them.
I don't want to make this too long but some more recent things is being excluded. We had a special event and I wasn't told about it until the week before. The day comes and the kitchen is short staffed and I asked if I should ask our regional director to approve overtime (since he was there for the event) for someone and she said since im here I can just stay inside and help. I literally had to switch off days to come to this mandatory event. We had an inspection and I kept getting shooed away from the inspector. And then I see all the other managers, the boss in question, and the inspector sitting in an office talking.
I've been documenting these things-also the employees have come to me specifically because they can't trust the boss and one other manager, one of them literally told me today she didn't feel comfortable talking to the other manager about her day off request-among other things. I was hired by the regional director and we had a talk a few months ago where he admitted that when he hired me they didn't have an actual plan for what to do with me (I was hired because I have a specialized degree) and said don't worry about my boss or my job, that I'm not leaving unless I want to go. And while that's great to hear idk. I'm not the only one she's awful to, she treats a lot of the staff poorly and this has been going on for nearly a decade.
I'm planning to do more documentation but what do I do with it when I'm ready? Do I try to talk it out with her first (not mention the documentation)? Do I take it to my regional director? Do I take it to HR?