I think some people are too privileged to acknowledge the hardship that women ALONE in those eras had to face, not to mention queer women. That was literally hell. Heck, even nowadays there are still so many cases in which women don't have any authority in their OWN lives as well. This is still common in Asian countries, the cultures here are much more different from Western cultures, so please don't use your point of view in a modern, more free society to judge people who are oppressed in such long period. Comhet is real.
About Kiyoko and Mitsu here, sure thing that Kiyoko's choice was way too wrong for both of them, but as you can see in the newest chapter Kiyoko had been a more confident woman, there must be something that tired her out to be the indecisive, reluctant woman now. Or maybe her relationship with Mitsu was tiring enough. She did, and i think she still does, love Mitsu, but the prejudice back then was too overwhelming. I really feel sorry for both of them, to live in a society like that.