I think I just today realized I ended up with the wrong girl. What do you think?

Thank GOD i didn't marry her. We've been together for 6 yrs. now and at first you know its all good. The sun shines brighter, the roses are redder blah blah blah. Now I look back at my last 4 yrs with her and think it shouldn't be like this. I currently am out of a job because of a layoff and am currently watching over an8 yr old child who is not biologically mine but i am his father, and our 1 yr old son. She is a nurse who gets paid well and works long hours. I am grateful for her and appreciate everything she does but its not a two way street.I do everything that concerns my home and my family.Cooking, cleaning, laundry, and all the other long list of duties I have never realized until i lost my job. Stay at home moms i praise you because it can be alot more stressful and a lot more work being at home all the time than a 9to5. My G/F comes home to a cooked meal everynight a fresh household and healthy kids. But as I said appreciation doesnt go both ways. She calls me useless because im not bringing in money, She threatens to kick me out whenever we argue about me not bringing in money. Two weeks ago in a heated arguement she threw my clothes out the front door and told me to put my son down because i wont see him. i was hurt. I'm home at all times except for one exception. Ive always loved to go fishing. I remember going with my grandfather and its still stuck to me. Sometimes when she gets home i would get a few hours of fishing in but oh my goodness, the drama i go through just before i walk out the door. I sometimes dread to try to go fishing because of the preconsequence. I've thought of leaving but can't because my kids are my world. I cant see myself without them. I would rather take all the crap ive been getting and all the heartaches than be without them. So i guess im stuck huh? All i know is i am not the same person that i was 6 yrs ago. He left a long time ago. Just some advice would be nice because i tend to keep the stress in my mind mine. thanks.