I think quite a few couples would say this. Me and DH have had our ups and downs, and there have been times in the past I wanted to leave. He kept HIS money to himself, and treated me like shit some days for about 3-4 years. He was so selfish and self centred and did fuckall in the house, whilst I did everything, and looked after the kids, and still worked 3 days a week.
If I had been financially independent at the time/well off, I would have taken the kids and left him. But I couldn't afford to. My folks had passed away, and so had his. I had nowhere to go and didn't want a life of a single mum living in penury. I wasn't loaded living with him, but would have been far worse off leaving. I really resented him, and was quite angry with him some days. We got on OK sometimes, but he was enough of a shit to make me want to leave.
Anyway it was a rough patch and we did get through it, and have been fine for 14-15 years now thankfully. I am glad I didn't leave now, as the kids have left, we have the place to ourselves, and a good relationship. Loads in common, lots of laughs and adventures together, and I do love him. He has grown up a lot and is kind and generous and just a pleasure to be around (most of the time!) And we pool finances now, even though he earns a third more than me. But yep, I would have left then if I could.
Makes you wonder if couples who split quickly/early on in the marriage could make it work if they stuck it out through the bad times. I guess for some the bad times are just too bad! (And/or last for too long!)