All depends on how you view support? There is loads of support out there including, GP’s, MIND, Samaritan, Al Anon, Adfam, fellowships, meet people and so on.
Just because you feel alone, doesn’t mean you are and that is no reason to remain in a relationship that is abusive, because that’s what it is, and the affects on children can be devastating (my opinion).
If you do have zero support then I’d ask yourself why are you so isolated? How did this happen etc!
And breaking away from any relationship is HARD period!