Hi L., I went through a nasty divorce and didn't think that my lawyer was doing her job, but thought that it was too late to change... Just change. It is not too late!!! Take care of yourself!!! If it doesn't seem right, then it isn't.
The mediator's job is to keep it away from a judge... that is true, but they aren't fair!!! They are not trying to be fair!!! You need to know and believe that. They are not their to do what is best for both parties and the kids, they are their to get this done and over with as quickly as possible.
Take it to the judge if you have to. I found that the only person that I could trust to do what is right and to be fair was the judge. After going through 4 yrs with the mediators, I finally said enough, and NEVER settled out of court again. I found that the mediator leaned toward the pushy, bully every time, and I lost a lot in the first 4 yrs by thinking that they were trying to be fair. They aren't. Take it to the judge. You should get half the debt, half the businesses, and you will lose half of your house, and gain child support, alimony if you haven't worked during the entire marriage and he has a thriving business or you can show that you don't want half the business but you do want alimony (which is what I would go for, since if you get half the business, then he can screw you by letting it fail, or at best you will have to work with him on a daily basis).
Get a mean, tough, lawyer who is willing to fight for more than you deserve, because that means you will probably come out with a fair, equitable settlement and neither of you will get screwed.
He isn't playing fair, so you can't or you will get burned.