NTA. Big red flag in my opinion. If the current job isn't a good fit, then she should have something else lined up.
My first marriage went down this path. After I got my first corporate job, paying about $47K a year, she thought that was good enough for both of us and quit her job. We had talked about it once, but left it as not being a good idea at the time, but could revisit the idea later. We neded to save for other things. She decided on her own to quit, even though she had a decent job and great boss IMO. She wanted to be her own boss and expand her side hustles of crafts and photography. She tried but never could make anything much more than a little fun money doing those things, and had no business or customer services skills. She also couldn't pitch in around the house or cook either and we didn't have kids. I tried to be supportive as long as I could, but it got ridiculous fast. She painted herself into these niche segments that limited opportunities, like she was only going to take pictures of high school senior girls. No families, newborns, weddings, couples, just that. Soon she was doing everything for free, trying to build clients/portfolios, and giving away free services for several months. I think I told her it was just a hobby at that point and she needs to be charging. Then she started hanging out with these younger girls she was taking pictures of and just getting stoned all the time and just hanging out instead of being a productive human, while I worked all week.
Needless to say there were other factors, but that was a heavy contributor to the end of that marriage. It takes two people wanting to move together in the same direction and both contributing in some fashion.