Do you have a written lease? If so, is it a month-to-month lease or a lease for a particular term? If so, when does the lease term expire?
Not that it matters, but no, it's isn't plainly obvious.
The following assumes nothing in any written lease about any of the things mentioned:
1. Ice maker -- no obligation.
2. Kitchen sink water pressure -- no obligation.
3. Ant infestation -- yes, but this sort of thing is difficult to eradicate completely and is typically dealt with by using spray and/or traps.
If you're month-to-month tenants, yes. These are the sorts of problems you're going to encounter when you choose to live with other people -- and especially when you choose to live in someone else's home. If you want complete control over the temperature, get your own place.

