The harder I try the worse it gets

I am 21, and I have been depressed since 14. I never thought I would see these days anyway, but somehow I have hope, so I try stuff, but the harder I try, the worse it gets. Especially lately, I can't even workout, which is pretty much my favorite thing to do. I haven't cut myself in years, but the urge is really strong. I don't know what to do. No matter how many meds I use, no matter how much therapy I get, nothing ever works out. I'm diagnosed autistic so it might be autistic burnout instead of depression, but I don't even know at this point.