Go with your gut feeling.
I have just recently 'helped' my daycare family make the decision to end care and move on. We are just not the right fit. This daycare mom has no filter and from day one I thought she was a little off.
Sounds like you are better to end it before you get into a poor situation like I have. Thankfully you have the contract renewal coming up....
The fact that the parents drive you nuts..it will only get worse when little things will really drive you around the bend and it's not worth it.
Good luck!