It seems htmx stopped working as soon as you gave up on the super light frontend part :)
You started using third party libraries to render complex UI/UX and state management.
Also, I’d like to point out that saying “it was easier to do X in React” is not really fair if you did that using third-party libraries. It’s just that somebody did it for you so that you didn’t have to.
I sympathise a lot with what’s written in the post actually but in this case I think that htmx was not a good solution from the start if you knew you needed to manage complex states and rendering.