I am so sorry for what you are going through. I find that people who are sarcastic and put others down with degrading and overly critical attitudes are the ones with the greater problems. Depression is not something that you can choose not to have and it just goes away. It is a struggle. Some days I feel ok and then there are the days that I just have to push myself to keep going and I function like a zombie. When I get cruelly put down I sink even deeper into depression. If possible can you find positive and accepting people to surround yourself with whenever possible. Apparently that is not your family. No one needs nor deserves to be treated in the manner you describe. You are God's creation and a worthwhile, valuable human being. I am glad that you have come to pc. There are many supportive people here who care about the struggles of others and will provide the validation that you need and deserve. Please do not give up. we care.
Hugs