So I'll speak a bit from my own experience in a similar startup situation. Similar in that I had a co-founder problem but we were pre revenue and only a little

So I'll speak a bit from my own experience in a similar startup situation. Similar in that I had a co-founder problem but we were pre revenue and only a little over a year in. Ultimately having money coming in changes the equation. So any decision that's made is a big cost/benefit analysis. My life was made miserable and sleep were suffering. I simply couldn't continue and felt my time could be better spent on higher productivity projects. So I left... Now with a few months of hindsight since the departure, my quality of life is better. I've moved on to projects that are more fun. I miss the old startup and what we built, but it wasn't worth continuing in that situation. If I were to reflect quickly on how that situation arose: slow loss of mutual respect and breakdown of communication. So always keep communication open and always keep it civil.