We homeschooled, always offering our kids the option of regular school. Some of them tried it, but all liked homeschooling the best.
I think it would be hard to go to your senior year in any unfamiliar school. Social groups are well formed by then and it's hard to make friends. And surely being with friends is one of the top motives for going to school.
My kids all did fine making the transition to college after home-schooled high school. I think it is quite likely that you will do well next year whether you decide to stick it out or go back to home.
And no, your family doesn't suck. They just want you to do what they think is best for you.