In terms of outcomes I am convinced that co-founder disputes (been there done that) are still a lesser risk to success than the banal reality of simply losing motivation as a single founder. I am a rather determined person but would I have gone through all the way with my first startup while going experiencing the roller coaster? Almost certainly not.

Another thing to consider: In a dispute you may actually be the wrong one, and even if you end up leaving when you would have been right, your remaining co-founders may lead the company to some success while you retain your vested shares and can recharge for/ start the next thing.